from a device you have previously used to log into Facebook. This helps the system recognize you as the legitimate owner. Identify Your Account : If you cannot log in, use the Identify Your Account
Go to Choose an authenticator app (Google Authenticator, Duo, or Authy), not SMS. SIM swapping is a real threat. facebook.com hack id
Have you been locked out of your legitimate account? Visit Facebook’s official help center at facebook.com/help. Do not search for "hack" tools. They will only make your situation worse. from a device you have previously used to log into Facebook