Telegram has a bot for marking channels registered with Roskomnadzor. There is no official obligation to do this yet — Novaya Gazeta Europa

To do this, you need to add a bot from the RKN to the channel administrators that will be able to view the list of subscribers

Telegram now has a bot for tagging channels registered in the blog registry with 10,000 subscribers or more. This was stated by Anton Gorelkin, Deputy Head of the State Duma Committee on Information Policy. “Telegram users now have the opportunity to quickly and clearly see which channels can be reposted, and advertisers can see where to post. I think that over time, this mark will also become an understandable marker of the channel's author's r…