I use Obtainium for apps not on F-Droid or as a backup uploader for this type of cases. You can also try to use an alternative app for F-Droid, I usually prefer Droidi-fy,
My Lemmy account is 2yo (like you can see) and I can ensure you communities and user activities are improved so much. It all depends on quality content and from users these days.
Not an easy step to find a text editor I like. I've tested pretty much all the ones I can find, the most decent UI is probably Orgzly but I had sync issues in the past, and it's just a decent UI.
I use Obtainium for apps not on F-Droid or as a backup uploader for this type of cases. You can also try to use an alternative app for F-Droid, I usually prefer Droidi-fy,