Both latest versions of Android and iOS support passkeys plus support on Chrome/Brave/Edge/Safari. While not as secure or convenient as a security key for init

Both latest versions of Android and iOS support passkeys plus support on Chrome/Brave/Edge/Safari. While not as secure or convenient as a security key for initially logging in there is no need for a new device in many cases. besides the fact that the webauthn yubikey is $20 vs $50-70 for it's more popular and well known versions.