For example, ntfy and Sunup are listed on UnifiedPush.
The ntfy app (F-Droid) has not been updated since December 2022. I take a critical view of this and fear that ntfy is no longer being actively developed.
Any experience with Sunup or other UnifiedPush services?
I know you weren’t asking me but…
The only app I have found that needs ntfy and doesn’t work with microG is <polycule> (‘A geeky and efficient [matrix] client for power users’). I tried it but don’t use it regularly, as it seems a bit ‘flakey’. In Settings | Push notifications, you can choose 'Google Firebase Messaging`, 'Unified Push, or ‘Disable push notifications’