It doesn't even have to be something as bare-bones as pass. You can have a full-fledged password manager that is open-source and local-first. KeepassXC (and the OG Keepass) were always OSS and local-first. The original version of Keepass 1.0 for Windows was released long before Lastpass or 1Password[1], so we had an open-source local-first password manager before we had commercial cloud-based managers.

[1] To be more accurate, although it was always proprietary, 1Password was also local-only at first, with syncing only supported by putting it on something like Dropbox. They only added native cloud syncing later and eventually made it cloud-first.