AFAICT yes. From what I could find, it seems they dropped the Microsoft App Store from 30% to 5%, but their % take for games is still 30%, including in-app purchases.
30% for base level developers with little to no publisher support, anything beyond that is intentionally shrouded in industry secrets.
Rumors are some publishers get the 5% deal (or better?), at least for digital-only sales, as some of those publishers have indirectly mentioned higher profit margins on Xbox versus PlayStation, but who knows how accurate the rumors are (or if there are other confounding factors for higher margins on Xbox such Microsoft subsidies or Microsoft's increasing "economy of scale" with keeping PC and Xbox in closer API sync these days) because Xbox keeps a tight lid on publisher specific deals, unlike the rest of the App Store which tries to be much more transparent. The fact that Epic isn't complaining so much about Xbox sales seems to indicate a favorable position on Xbox as well, but again any such details are probably closed room deals we can only guess at from the outside (and probably in constant flux with Xbox marketing as Microsoft wanders between incentives based on favoring Marketing tools/projects like Xbox Play Anywhere, Xbox Game Pass, xCloud, Xbox Smart Delivery, etc).
[0] https://9to5mac.com/2019/03/06/microsoft-store-revenue-share...
[1] https://blogs.windows.com/windowsdeveloper/2019/03/06/update...
[2] https://www.ign.com/articles/2019/10/07/report-steams-30-cut...
[3] https://query.prod.cms.rt.microsoft.com/cms/api/am/binary/RE...