New XBOX Series X lost in the sauce, send help 😂

So just got the one that also takes an actual game (I am old) I have the Ultimate Game Pass. So here is where things get confusing. I have 2 profiles set up on my console, myself and my husband. I did it through the family Tab and he had to accept and set it all up.

He started playing Call of Duty 7, he started it on HIS profile. But now when he goes to sign in it won’t sign in under his profile and only signs in under my profile and won’t let him sign in under profile. So how do I delete his profile information from my profile make it logs his activision under his and then I can create one for me??? So frustrating.