Sounds a bit worrisome to me…
Maybe I'm just overly cautious,
but i guess it's time to look around again.
Has anybody checked out APass yet?
https://github.com/balu-/a-pass
Without looking close at your suggestion, you might want to look at passage [0] by the creator of age. It's a fork of pass [1] using age as the backend.
For my personal passwords and general secure info (it can store notes, files, and TOTP as well), KeePass(XC/DX) has been my password manager of choice. Nothing leaves your device. If you want it to, that's considered out-of-scope, and you have to handle syncing yourself. Whether that be something like Nextcloud, or my personal favorite: Syncthing.