I think the Telegram app for watchOS is currently missing several important features that would make it much more useful as a standalone messaging app.
I would like to see the following core features added:
Replying to messages
Quoting messages
Adding reactions to messages
Deleting messages
Editing sent messages
Sending and receiving stickers
Starting and receiving Telegram calls directly from the Apple Watch
When viewing forwarded messages, showing the name of the original sender so users can see who the message was originally sent by
Text formatting options should also be supported when composing or editing messages on watchOS, including:
Italic
Bold
Strikethrough
Underline
Spoiler
Adding links
These are basic messaging features that are already available on other Telegram platforms. Bringing them to the watchOS app would make Telegram much more practical to use directly from an Apple Watch, especially on cellular Apple Watch models where the watch can be used independently from the iPhone.
I hope these features can be considered for future versions of the Telegram watchOS app.