Build to XBOX using Ue4.27

I am currently developing a game and i wanted to publish it. Seemed like the microsoft store was the best thing.
So i buyed the dev license (Inscription en tant que développeur d’applications - Développement d’applications Windows | Microsoft Developer) and i created a application on the Partner center.

When it asked me for a package, it asked for a .msix, .msixbundle, .msixupload, .appx, .appxbundle, .appxupload, .xap package, but i don’t see the option to do that in UE4.
Can someone help me? Thanks