Telegram receive channel messages

I'm trying to read a telegram channel but I can't get it to work. I can read my bot but not a channel linked to this bot. Anyone have an idea if this is possible?

Yes, it is possible to receive channel messages to Node-RED via a bot. Lots of us do it and there are lots of examples in previous threads & probably in the Flows Library as well.

Sorry but I still can't figure it out. I do receive notifications on a group that I send to this group myself, but notifications from others do not come in. I'm using the correct IDs but seriously don't know what I'm doing wrong.