Wasteland 3 can be played on Xbox Game Pass or Game Pass for PC, however, it is not a Play Anywhere title, which means game saves are not shared between the platforms. It also means that your purchase of Wasteland 3 DLC (which is paid content and not included in Game Pass) will not apply to both platforms. Please be sure that you purchase the correct version of Wasteland 3 DLC that applies to the platform (Xbox or PC) you're playing on.
Any issues with purchases, incorrect platform purchases, and resolution for purchase issues via Xbox, Game Pass, or Game Pass for PC, can only be resolved directly through Xbox support.