я спроил bingo AI, он ответил:

To add a comment feature to your Telegram channel, you can follow these steps:

Launch the Telegram app.
Click on the channel where you want the comments enabled.
On the top right corner, click on the menu with the three dots.
From the dropdown menu, click on “Manage Channel”.
Select “Discussion” and then “Add a Group”.123
I hope this helps! Let me know if you have any other questions.

сделал так, но ничего не поменялось