I installed Keepass on my windows desktop along with iCloud drive sync. I keep my Keepass database in my iCloud directory. I can now use this Keepass database on my iPhone (via Files app), on my Macbook (iCloud Drive). Any changes made are automatically synced daily.
Is that really too difficult? And yes, it does "just work".
Bonus: Any passwords stored in my iCloud Keychain are also synced to my Windows Chrome instance via Apple's 'iCloud Passwords'[1] plugin.
[1] https://chrome.google.com/webstore/detail/icloud-passwords/p...