The Yubikey can be set up easily with Windows 11. You can imagine that it works similarly to a mobile with a 2FA app installed. Basically, you have the same functions with a mobile and a 2FA app. The advantage of the Yubikey is that it works on all devices (mobile, PC, laptop, tablet, etc.). I use the version with USB-C and Lightnig connection for the iPhone. However, remember: make sure you buy 2 Yubikey, because you need a copy, a backup, should the Yubikey ever become defective or lost. The topic of getting lost is present with the Yubikey anyway, because it is small and inconspicuous and you should always have it with you. There is a great danger that it will suddenly get lost. Tip: Do it with a mobile and a 2FA app!

Yes, for all services that offer a security key. Not directly compatible with Windows "hello".