Okay, so now it says I created a passkey for Meta but I STILL don’t see the 6 digit code anywhere. I just tells me I created a passkey which I can’t see.
I have never used FB but see if this helps any
https://www.youtube.com/watch?v=gPWPLvi4E-Y
I had to download an authenticator for certain games that require 2fa. The authenticator requires an original one-time code to set up then whenever I want to log in I have to request a 6-digit auth number to send to the game.