Can you play Sims on pc if you own it on Xbox, with Game Pass Ultimate?

EA Play for PC is now included with Game Pass Ultimate & Game Pass for PC, so yes, you can play the game on PC only if you have Game Pass Ultimate or Game Pass for PC.

If you follow the instructions on this video, you should be able to get onto the Sims. https://bit.ly/2OgpBI6

EA Play is now included for Game Pass ultimate. You'll need to download the EA Play App by following the instructions on the Xbox App on your PC.

PC EA games are not cross-save compatible, so you'll need to start from the beginning on any games you choose to download.

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.

If the game is cross-play, then if you own the game, then you will need Gold or Game Pass Ultimate to play with your Friend on PC. Since the game is available on Game Pass, then you will need Xbox Game Pass to play the game if you do not own it.

The Sims 4 is not included with Game Pass. You can play the game through EA Play which is included with Game Pass Ultimate, but it's not actually part of Game Pass.