Passkeys are also supported on your Apple products such as Mac and iPhone. Passkeys are encrypted and stored in your iCloud Keychain where they aren't visible to anyone else.
With a Passkey created on your device, you will have the option to sign in via Touch ID or Face ID. Below are examples of how these prompts will appear:
Touch ID prompt on Mac.
Face ID prompt example on iPhone
You can find more information on Passkeys using Apple productshere.