We get it, you're a huge xbox fan and you're disappointed it doesn't have a release date. But let's be clear here: this is 100% on Microsoft. Larian has made it clear they aren't happy with the level of quality of the game on the S (believe specifically for split-screen) and they are holding out on a release date until solutions can be found. That is 100% their right, and you better believe if they released with a shitty performing S version there would be tons of articles, tweets, threads, etc moaning and calling them out on it (instead of the universal praise it is currently receiving). If Microsoft really wants the game on their console sooner they have options: They can help Larian get the S version running properly by providing developers/knowledge/tools/etc, or they could allow for games to have exceptions for certain game features on X vs S.
If anything, Larian have gone above and beyond what most other larger AAA companies put out: Cross-play, cross-save, DRM free, and a huge open-world full of enough options and branching paths to put basically every other RPG to shame. It's clear they want to deliver a great game that has everything possible they can put in it to please their customers. And part of that is not putting out a crappy version of the game. If you don't like it, maybe take it up with Microsoft; or wait patiently and see if they can't optimize and get things figured out once they game releases on the other platforms and they can spend more time focusing on the xbox platform.