@Shortcake No I don't think so. Not that I've seen on F-Droid, anyway. There are some for lemmy, though I kind of doubt the interoperability would be there. The developers seem to be working on official apps, though.
@Shortcake Not quite the same thing, but you can install the site as a PWA with a chromium based browser (Chrome, Bromite, etc). The mobile site itself feels pretty nice so maybe that will tide you over until there is a real app.