Can’t receive login code for Facebook
Error domain errors That’s what I’m getting
iPhone 13 Pro Max, iOS 15
If you're having trouble logging into your Facebook account, here are some things you can try. Go to facebook.com/login/identify and follow the instructions. Make sure to use a computer or mobile phone that you have previously used to log into your Facebook account. Search for the account you want to recover.
I can't log in to Facebook. | Facebook Help Center
Even you may see this --> Fix a Problem | Facebook Help Center
Still not solved then --> Report a Login Issue | Facebook