Hi @med.fdj09
Welcome to the LastPass Community.
Biometrics integration allows users to 'unlock' the already logged in or 'trusted' LastPass app, but does not take the place of entering the account password. Biometrics is also not a form of multifactor authentication, so you should be able to log in fine with your LastPass account email and password.
Please remember, even if the app is not available, you can always log directly into lastpass.com .