Hello @md2112,
Welcome to the Community!
At the moment passkeys can not be handle from the LastPass Authenticator app, only from your vault. We are working to make it everyday better for our users if it comes the option to manage them from the authenticator app we will inform our users. You can find more about passkeys here: https://support.lastpass.com/s/document-item?bundleId=lastpass&topicId=LastPass/about_passkeys.html&_LANG=enus.
Kind Regards,
Alejandra
LastPass Support