I didn't even notice that they did that and yeah I don't love that either. That being said their github commits reveal what they are working on: https://github.com/Catfriend1/syncthing-android/commits/main/
Or
https://github.com/Catfriend1/syncthing-android/pulls?q=is%3Apr+is%3Aclosed
Maybe they just expect us to look there and something is required for patch notes on F-Droid.
¯\_(ツ)_/¯