- Edited
See:
https://proton.me/community/open-source
https://github.com/protonpass/android-pass
You could theoretically use 2x links in Obtainium - one for convenient lookup of release info within Obtainium (link above in this post), another for apk updates (link in your post).
This isn't my setup though, not sure how it would work in practice or if this meets your needs.