Telegram chats have linked "discussion" channels, where users can respond to messages in the main channel. Occasionally, these are also public, and if so, can also be found by the API. It would be useful to allow users to also automatically collect data from these chat channels if they're found.
A note on this and future feature requests: we're (https://github.com/GateNLP) putting in some additions to the telegram data collector on our end. Thought it might be worth checking if there's scope for them to be added to the original/main instance.
If any issues with this/they don't really fit with what you have in mind for your instance, all fine, we'll continue to maintain them on our own fork instead!
Linked pull request: #322