I haven't seen any news that they've returned? I don't see it on Google Play, but I know you install it from unofficial sources as it doesn't do a region check.
Discussion
I just went to their site, clicked on download for google, and downloaded thru Aurora store, since i use Graphene os.
Seems dangerous to download open source software through Aurora - especially a bitcoin wallet. Better grab APK from github, or use Obtainium or zap.store