Only WinGet Community Repository supported

It seems that only the community repository is supported. The Microsoft Store (or custom repositories) are not supported.
https://github.com/badges/shields/blob/4daed4998f13a07d234a4eb8ed3996fb8516e461/services/winget/winget-version.service.js#L46

However, there are two types of repositories that can be added to WinGet: Microsoft.PreIndexed.Package and Microsoft.Rest:

• The Microsoft.PreIndexed.Package compatible repository has a source.msix and source2.msix file that contains a SQLite file with all packages preindexed. This seems to be the default type when doing winget source add.
• The Microsoft.Rest compatible repository hosts endpoints like /manifestSearch and /packageManifests/{id}. For example, https://storeedgefd.dsx.mp.microsoft.com/v9.0/packageManifests/9PM860492SZD gives the manifest information of Microsoft PC Manager on the Microsoft Store. The exact information I need (e.g. version of the package).

The msstore (Microsoft Store) repository seems to only support Microsoft.Rest. The winget (WinGet Community Repository) repository seems to only support Microsoft.PreIndexed.Package. Anyway, there is an official way to get the package information, instead of the unofficial way it is done now.

Start with services/winget/winget-version.service.js around line 46 and inspect how repository sources and package versions are currently obtained. Compare that flow with the Microsoft.Rest endpoints and repository types described in the issue; done means Microsoft Store and custom repositories can provide package information through the supported source behavior.