There's pass, a CLI password manager that's version controlled and encrypted with your PGP key: https://www.passwordstore.org/
There are also (unofficial) iOS and Android clients that sync to a git repo.
There are also (unofficial) iOS and Android clients that sync to a git repo.
If you have access to the code then (on Android at least) you could build and install the APK yourself.
That said, haven't checked for fixes in a while - the actual functionality of the app itself (when in working condition) is very good.
I believe i'm falling foul of this issue with actually encrypting things: https://github.com/android-password-store/Android-Password-S...