If using it as a security key (with a password) you don't need to give the device anything but a tap usually.
However, if you use a Yubikey or Trezor for example as a Passkey (No Password), you have to enter a pin on either (Yubikey via OS and Trezor on device) before they will fulfil the request and log you in.
> However, if you use a Yubikey or Trezor for example as a Passkey (No Password), you have to enter a pin on either (Yubikey via OS and Trezor on device) before they will fulfil the request and log you in.
Personally I consider a PIN, password or passphrase the same thing, just different rules. It is security based on knowledge. So If I enter a PIN somewhere it is still a password. IMO this is fine.
However, if you use a Yubikey or Trezor for example as a Passkey (No Password), you have to enter a pin on either (Yubikey via OS and Trezor on device) before they will fulfil the request and log you in.