They do have a big list of exceptions for password rules, you can find more details here. Seems they are collaborating with some other password tools, so maybe at some point switching products won’t help? Not sure. Bit Warden seems to make no attempt as this currently:
https://rmondello.com/2024/09/29/new-quirks-who-dis/
https://github.com/apple/password-manager-resources/blob/mai...
But you can also fix it yourself if it fails. How is detailed here: https://support.apple.com/en-au/guide/iphone/iphf9219d8c9/io...