the updated unlimited pass on pc

my father has a game pass ultimate. He's able to play pc/ultimate. my Xbox is home. When I try playing on the pc it asked me to buy it. how can you help me?

Are you logging in on your father's account, or your own account? Because my fiance wanted to play the Halo: MCC on the PC one time, but she had to be signed into my Xbox account in order to be able to play it because my account is Game Pass Ultimate. Otherwise,
you have to have your own Game Pass Ultimate subscription.

thank you well see how Microsoft handles it in a month

I do not have access to a xbox console as I got the game pass unlimited for my PC.

buying on a pc as a gift to someone on an xbox

I did this with the unlimited game pass and went to buy a game and this happened

tried a different card too no joy

I don't have or plan to play on a PC so for me the Game Pass Unlimited is not worth it, if you plan to move to a PC to play also, then it might be worth looking into especially since it is the same price