You could use KeePassXC. Just sync it on your cloud platform whether that be Google cloud or Nextcloud.

I’d also like to add that Forgejo is working on federation along with GitLab. I think Forgejo will do it first though.

I’ve got a Nextcloud instance that I’ve run for a few years. Love it. At home I have an Odroid H3+ with 64GB of ram running Openmediavault. Got about a dozen containers running on that. I need to play with it more and use that ram. I did try to get Boinc running on it but it, sadly, kept shutting down. I’ll have to find a another way to contribute to science.