I'm not sure what good an offline password manager would be... if you just mean self-hosted, Bitwarden and Vaultwarden both support that.
I tried KeePass and a couple variants like KeePassXC at one point and found them clunky and difficult to use effectively across multiple devices. Definitely not a good place for new users to start, and I'm not sure what problem they solve that isn't better served by Vaultwarden (assuming the main idea is to not use a commercial product).
...was double posting the thing?
I'm in such suspense