I try all the time that my friend shares Fifa 21 with me! It doesn't work, I can't find the primary Ps4 in my friend's account, although I have given the same information as it was prescribed on the Internet. I need help?!
This is only possible if you deactivate the other console beforehand. But you can also use your mobile phone and of course you have to be logged in with your account, not with that of your friend. If your friend has also logged in his console as primary, he must also deactivate this, since one and the same console can only be logged in as primary by one user.