Back in December I wrote a blog with an update on the state of Construct's Xbox support, based on Microsoft's new support for WebView2 on Xbox. There's more new...
Did a bit of research, I'm leaving this one here, maybe it's useful to someone, from learn.microsoft.com/en-us/windows/uwp/xbox-apps/(published on 03/16/2023):
UWP on Xbox One supports developing both apps and games. You don't have to be part of a developer program to experiment, create, and test games or apps on Xbox. All you need is a developer account in Partner Center. When you are ready to publish and sell games on Xbox One or take advantage of Xbox Live on Windows 10, you need to join the Xbox Live Creators Program or be an IDjjj@Xbox developer. If you plan to be an IDjjj@Xbox developer, we recommend applying to the program first before registering for a developer account. For more info, see Developer program overview.