Source? As far as I know they didn’t claim to not know location until iOS 17 release. Up until then they could access that info, and were required to give it up provided with warrants. This has been a reason Apple has actively been limiting the data they have access to. They cannot be compelled to give up data they have no way of accessing.
iCloud Keychain is super easy to use, but obviously you need a iOS/macOS to take advantage.