https://unifiedpush.org 👀 Maybe, you can probably release two versions of Damus Android in the future: - Google Play version (using FCM) - FOSS version (unifiedpush) Amethyst have done that.
There's the ntfy app, but I didn't succeed to get it to work with amethyst yet.
Yes, it is known issue. I think Vitor and KotlinGeekDev has already aware of the issue and might prepare the bug fix later https://github.com/vitorpamplona/amethyst/issues/688