Share the passkey. If you have 3 devices and create 3 passkeys, you need to enroll all 3 of them in each service you want to use. It’s unnecessary overhead. So

Share the passkey. If you have 3 devices and create 3 passkeys, you need to enroll all 3 of them in each service you want to use. It’s unnecessary overhead. Someone stealing any of your devices (unlocked) will get access to the service. There’s no security benefit.