F-droid inclusion seems to be stalled https://gitlab.com/fdroid/rfp/-/issues/2688
Having it in F-droid, vetted by their policies is kind of my benchmark for "software that is guaranteed to be not crapware."
That being said I'm rooting for the devs, having an alternative for tailscale+headscale would be nice, because as it stands it's kind of dependant on the goodwill of a for profit company (finite).
I recently brought my first app to F-Droid. It was not friction free, but I was able to do it within a few weeks. Seems they put not much effort into this, e.g. the basic check marks are not even checked...
https://codeberg.org/bg443/JetBird appears to use the same core library (and is just a different Android frontend wrapper).