I just did this on grapheneos. It works. Setup ntfy too.
For faster updates, install Amethyst (and all other Nostr clients) through Obtainium instead of Google's PlayStore.
Obtainium updates directly from our GitHub repository, instead of relying on any centralized review process by stores.
Just follow this video by nostr:npub1kmsnnxw6p8vlk2l2dh0443jkj0txl7jrww8qpx4vd428he0a8jqqy6tjep: https://cdn.satellite.earth/2bd7e308c1797d64fca09b1d61e9bde24c68dd45e501c7383eff1e85392df11f.mp4
Discussion
I've moved most of my apps to it and quite like it.