Deluxe Upgrade not owned in Xbox marketplace after purchasing Premium Deluxe on PC

I’ve been working with Microsoft support all day and they haven’t been able to help me. They basically informed me (and others seem to agree) that the issue is with the in game marketplace. It is not an issue of microsoft recognizing that I own the game. The issue I have is nearly identical to the one this person posted about a few months ago:

At the end of the thread, he points out that by viewing the contents of the Premium edition in the content manager, you can see that everything within the Premium Deluxe edition is actually there, so he wasn’t actually missing any content after all. This is not the case with me. If I expand the content of the Premium Edition in the content manager, it does not show any the of the content that should be included with the Deluxe edition, only the 5 premium aircraft and 5 premium airports.

Does anybody else have any insight? Do I just need to make a support ticket with zendesk? If so, how do I do that?