Telegram X

Yes, this feature is still present and doesn't go anywhere.
https://t.me/tgandroidtests/123567

See: https://t.me/tgx_android/194

Nice demo of the new header magic from the 0.22.1.1233 beta. Few more improvements and it should be ready to go out for all users.

0.22.1.1233 beta

New header in profiles. View long chat titles. Bugfixes.

Changes

1. Updated TDLib
2. Replaced few legacy icons with vector ones
3. New header in profiles
4. Ability to view long chat titles in profiles

Bugfixes

1. Weird sizes in web previews after changing screen resolution
2. Weird sizes in selection media counter after changing screen resolution
3. Small placeholder in non-contacts list
4. Crash when trying to open secret chat locked by passcode
5. Crash when trying to paste formatted multi-line content into bio field
6. Apply button presses automatically when multi-line content gets pasted in bio field
7. Titles of chats in global messages search may become green if there is secret chat in search results
8. RTL text overlays icons in the chats list
9. Both link title (web preview) and link text (message) are clickable at certain position of the message at the same time
10. Sometimes trimmed text disappears at all (this affects many places, including chats list)
11. Several issues related to text trimming in the profile header
12. Other bugfixes

0.22.0.1228 beta

Added separate theme color for chats list icons. More emoji support. Bugfixes.

Bugfixes

1. Saved Messages icon in Settings header
2. Saved Messages icon when previewing the account chats list
3. Saved Messages icon in Admins filter in recent actions
4. Placeholder doesn't update in chat screen title when chat title / user name changes
5. When archiving / deleting from archive sticker sets while on Settings > Stickers > Archive, list does not get updated
6. After archiving sticker set in settings > stickers, it's not possible to delete it from archive too without re-entering the screen
7. When manipulating with archived sticker set, its state on trending section doesn't get updated
8. Problem when typing/action text overlays the animated icon should be fixed

Emoji Support

1. Header subtitle in media viewer, Storage Usage, Network usage screens
2. Contacts list
3. Shared groups
4. Storage usage > chats (titles, placeholders)
5. Website sessions
6. Blocked Users
7. Secret Chat Passcode Lock
8. Encryption key
9. Sticker Pack name
10. Shared Link placeholders
11. Multi-line inline results placeholders
12. Group/Channel members placeholders
13. Share menu title
14. Placeholders in messages
15. Promoted by/restricted by/banned by on member list and restriction screen

Theming

1. Added separate theme color for chats list icons

0.22.0.1229 beta

- Fixed wrong color in members list.

0.22.0.1227 beta

Emoji display support everywhere, chats list rework, shared media counters, and more.

Features and Changes

1. Shared Media counters when tabs are attached to the header
2. Reworked and improved text rendering. This affects chats list, link previews, shared links, inline results, etc.
3. Emoji display support in texts everywhere within the app
4. Formatting support in pinned messages
5. Links in pinned message preview are now clickable (both tap & long-press)
6. Counters are now demi-bold in most places
7. Changed input text selection background color in Night Blue theme
8. Unified avatar placeholders rendering: now they follow the same
9. Crossed bell emoji in notifications when sender has explicitly disabled sound
10. Many minor changes and improvements on the way
11. Improved censorship circumvention
12. Protection in couple places against vertical utf characters

Chats List

13. Three-lines chats list style
14. Option to select between different chat styles (currently available: 2-line, 3-line, and 3-line with bigger text)
15. Formatting support
16. Media and forwarded messages icons
17. Unified message preview text with notifications
18. Game name is now displayed in the chats list
19. Pinned message is now displayed in the chats list like regular message with special icon
20. Album captions or number of media within an album is displayed now in the chats list

Region Selector (phone number screen)

20. When tapping region, it gets fully selected for convenience
21. When tapping region for the first time, you will see full list of regions instead of the single search result
22. Slightly improved region search algorithm

Known issues

1. RTL text + icon in the chats list gets messed up
2. Sometimes action text (typing, uploading, etc) is displayed under the animated icon

Possible bugs (report if you find them)

1. Saved Messages placeholder is used instead of the full name for the current user, where it is not intended to be, or vice versa
2. New RTL-related issues outside messages or IV, excluding the one mentioned above. If you find several of them, please collect them in the list, and then report to the group.

Bugfixes

1. Avatar in drawer: solid line glitch on the right side of it
2. Avatar in drawer: when switching to the account with avatar, its radius may get stuck on non-zero value
3. Duplicate location message when stopping live location from message menu
4. Rudimentary option to send Live Location in secret chats which does not work
5. Can't switch slideshow to previous position in IVs (back swipe intercepts)
6. Send link with media (e.g. telegram or instagram slideshow), try to open media without reopening the chat, animation won't work (simple cross-fade)
7. "Loading user..." in replies to an auto-forwarded channel message in a group
8. Crash when parsing certain texts
9. TDLib: after performing storage usage cleanup, chats list is missing until re-entering the sreen
10. TDLib: several crashes
11. Missing ellipsis character in trimmed link previews, shared links, etc
12. Fixed character loss + overall break in the text render engine when end of prev part does not match the start of the next one and this gap includes a newline
13. Header bottom bar text may slightly touch the fast forward icon
14. Links or lines are not clickable at all in the text viewer (e.g. https://t.me/contest/103)
15. Flag emojies in avatar placeholders get converted into alphabet
16. Specific case when text may exceed its maximum bounds
17. Chat title in the chats list overlaps the ticks icon
... + more

Translations

1. Replaced Default with LedDefault on Customize Notifications screen
2. Separate string for support accounts when it's online
3. Separate string for game invites in groups

Telegram X was updated to version 0.22.0.1205

Brief overview of what's new:
https://telegra.ph/Telegram-X-09-21

0.22.0.1203 RC

Improved link previews. Started instant view rework.

- Improved link previews with external media
- IV opens fully by default
- IV can be closed by swipe
- Links inside IV open without prompt (in IV, when possible)
- Option to "Open In..." while viewing link in Instant View
- When you generate IV via custom template (t.me/iv?url=...&rhash=...), all links inside such IV will be opened with the corresponding template, if possible.
- Made embeds in Instant View usable

Bugfixes

- Text may be hidden under the image in link previews (long site name or big text sizes)
- Memory leak that could force app to be in the fullscreen (until restart)
- Eliminated many IV-related bugs, including app freezes
- Some photos display in low resolution
- Other bugfixes

0.22.0.1204 RC

- Improved twitter video link preview
- Fixed "Use system fonts" setting

0.22.0.1205 RC

- Fixed crash when playinc flac
- Fixed white header in IV when using dark themes