Only in their own ecosystem, though, right? I use Windows and an iPhone; nothing syncs. I use 1password instead.
https://support.apple.com/en-gb/guide/icloud-windows/icw2bab...
After you set up iCloud for Windows, you can use iCloud Passwords to access your passwords in Google Chrome or Microsoft Edge using a browser extension. You can also manage your passwords in the iCloud Passwords app.