Pretty sure the official app has been in testing for a while. And I feel like I heard recently it’s releasing a stable build.

In case I’m wrong though, there’s always PixelDroid and the recently released Pixelix.

Also, like most fediverse apps, the first-party, official apps are always very basic and more of a proof-of-concept kind of thing. In most cases you’d be better served with third-party apps.