Your only chance is installing Windows on deck. Which is possible, but far from enjoyable IMHO.
My limited understanding is that Gamepass games are distributed in some Windows only package/format („stuff that you download from the windows store“) that does not run on Linux/SteamOS, emulated or natively.
1: No spam or advertising. This basically means no linking to your own content on blogs, YouTube, Twitch, etc.
2: No bigotry or gatekeeping. This should be obvious, but neither of those things will be tolerated. This goes for linked content too; if the site has some heavy "anti-woke" energy, you probably shouldn't be posting it here.
3: No untagged game spoilers. If the game was recently released or not released at all yet, use the Spoiler tag (the little ⚠️ button) in the body text, and avoid typing spoilers in the title. It should also be avoided to openly talk about major story spoilers, even in old games.
Your only chance is installing Windows on deck. Which is possible, but far from enjoyable IMHO.
My limited understanding is that Gamepass games are distributed in some Windows only package/format („stuff that you download from the windows store“) that does not run on Linux/SteamOS, emulated or natively.