

This works on Windows and Mac Firefox, you’ll get a prompt from the operating system to enter your credentials (e.g. PIN, biometrics) and it will save or retrieve the passkey.
The Apple implementation is poor and relies solely on having an iCloud account, which if it is disabled by enterprise policy means you needlessly cannot use the feature.
The 21:9 aspect ratio on the modern Xperia has always felt like it adds size with very little benefit. Makes usage two handed very often. Such a shame they didn’t keep a 16:9 compact.