Can I register with onion domain mail on Facebook?

I want to use Facebook anonymously, can I register the domain of the email address to register with the onion domain? Or are there other better things or alternatives to the onion domain? please tell me!

umm, well what about try ? you can change it easily if it did not accept it also you can try on onion version of tor…look all i know that normal servers can’t access to tor ones (thats why onionshare exist) so i not think normal facebook will accept it so you can try on onion version (facebookcorewwwi.onion)