F-droid themselves gave an update in April:
https://f-droid.org/en/2026/04/03/twif.html
If you’ve been holding off updating Syncthing-Fork we have two pieces of news for you. First, the original dev continues to collaborate still, we know this was a pain point back then. Second, we’ve just added BasicSync, A simple app for running Syncthing, which just controls Syncthing’s running behaviour as hands off as possible, while the original service hums in the background.
So it seems since the handover things have settled but there is also a new fork which takes a more bare-bones approach.