Can i play xbox game pass for pc on xbox ?

if i get the xbox game pass ultimate can i play it on pc or can i only play the pc game pass

Unfortunately it cannot play on the pc with those games but I can advise you to take the ultimate game pass so you can play with all the games of the xbox game pass both on xbox and on the pc

PC Game Pass is mainly PC only games, but there are a few exceptions. These games would be Xbox Play Anywhere games, which mean you can play on PC and Xbox. This list should tell you which games you can play on your Xbox as part of the Play Anywhere program. https://www.xbox.com/en-GB/games/xbox-play-anywhere

Remember that the games that are on PC Game Pass and are part of Xbox Play Anywhere can be played on the console.

Timespinner has been on Xbox for months. I've had it installed since then, but it is only available on Xbox Game Pass for PC, hence why it doesn't show on your game pass games. But the game is an Xbox Play Anywhere game, so can be played on your Xbox Console
if you have Xbox Game Pass for PC or Xbox Game Pass Ultimate. You can of course purchase the game if you wish, and play it on Win 10 or Xbox One.

No, although some games on Xbox Game pass for PC that are part of Xbox Play Anywhere, can be played on the Xbox using the Game Pass for PC subscription. List of games that are part of Play Anywhere can be found here

https://www.xbox.com/en-GB/games/xbox-play-anywhere