To read my Reddit article about what this should be done, check my linked post on Reddit (I'm still writing it on 18/06/2022. User u/FlameOfGod1X).  The shorter version:

The non-release of FINAL FANTASY VII REMAKE INTERGRADE for Xbox necessarily implies a loss of profits for the SQUARE ENIX, in addition to a loss of popularity of the franchise among Western fans and even Japanese fans.

Based on this premise, there is currently no explanation that justifies the absence of FFVIIR on Xbox, but a lack of respect on the part of the company with the FFVIIR fan base, going back several steps compared to other competing Japanese companies.

We believe that this request is feasible, low cost, and has high added value.