OTP sync Nextcloud
I know /e/ is thinking about including a password manager, nextcloud synced, in its future installations.
Hereby a suggestion to also include an OTP app, that is nextcloud synced. I just found this one:
https://play.google.com/store/apps/details?id=dev.cat.coffee.authenticator
And of course Bitwarden is also open-source, which includes an OTP function: https://github.com/bitwarden