Current link/connection potions between android and apple products 2021?

I dont think you get it, I cant login to facebook through the game at all, it wont let me. Ive never reached those steppes on the "new device" guide youve linked. Otherwise you would be right and I would have done it already.
This seems to be an old bug, cause as I wrote in the first message, (according to former topics on this forum), they reffer to problems connecting to facebook through the game aswell, just in slightly different ways than my issue.