Can i Play Diablo 2 Resurrected 2 with my Game Pass Ultimate subscription on PC

Microsoft is not own Activision at this time. While Activision titles may be added to Game Pass in the future should the merger go through, there is no guarantee of this, no timetable, and you'll just have to wait and see

You can't as pc version is only available on battlenet or steam

Hi, Ozan. My name is Ron, I'm an independent advisor. I will be more than happy to help you.

Upon checking the list of games from Game pass on this link, https://www.xbox.com/en-US/xbox-game-pass/games#

It seems that the game is not part of the list for both console game pass and Game pass for PC catalogs.

I'm switching to Game Pass Ultimate because I play on the PC a lot too, so it makes sense to add Game Pass for PC to my set of Xbox subscriptions. Having them all tied into one payment with Ultimate just makes it easier. Plus, with my current active subscriptions,
I'll be good on Ultimate for around 2 years.

Yes, a 1 month subscription is all that's available. If you do buy it while you still have Core, it will upgrade the remainder of your Core subscription at a ratio of 3:2.

Or, if you still have PC Game Pass, you might as well upgrade to Ultimate instead of 2 separate subscriptions. Ultimate includes PC Game Pass and Game Pass Standard plus cloud gaming and EA Play.