[olq]

Personally I've been using KeePassXC with self hosted Nextcloud sync for many years and it works great on desktop, apart from minor merge conflicts when server or clients been offline for long. I haven't found a good solution for iOS but Keepassium and Minikeepass is OK for occasional logins. I think it might bee more of a Nextcloud issue on mobile.

I think it's totally insane to let a third party manage your passwords.

[0x008]

Strongbox is a nice iOS keepass compatible client. Integrates with the iOS password auto fill and can use can use Face ID / Touch ID with the pro versions. It supports google drive, iCloud, onedrive, sftp and local Storage on your iOS device. I find the UI is quite ok.