In the recent Play Store policy, it will become mandatory for you to fill out the Data Safety Section. Since this is an OSS Android app, it will make sense to have it as a part of the repository as well.
I have run the scan using my tool here on your repo, attached are the scan results. I found the following:
Diagnostics: We definitely don’t do diagnostics. We don’t even know how many downloads the app has because F-Droid does not count downloads. The app counts the number of times you pressed the stream/download button to offer changing the corresponding setting but that data stays locally on the device.
Device or other IDs, User IDs: I don’t know of any IDs that we would collect. We do not even have a server that could do that. Just the forum server and a Jitsi instance for contributor meetings.