No, Elden Ring And GTA V Are Not On Game Pass (Yet) - Kotaku

And in June, Microsoft announced that Xbox Game Pass Ultimate users would be able to play “select” titles they own via Cloud Gaming, even if they weren’t part of the Game Pass catalogue

Put those two things together and it seemed entirely plausible that Microsoft had simply jumped the gun on a couple of GamesCom announcements

Calling these listings a “bug” certainly seems to put a dampener on that enthusiasm, but GamesCom kicks off on August 22 just in case you want to keep an eye on things anyway