That app shows how to use an ESProj (ECMAScript Project) to include the output JS files as Static Web Assets in an ASP.NET web app. The same pattern could hopefully be used to reference a JS/TS app from a .NET MAUI app with HybridWebView. The .NET MAUI app could reference the ESProj and include those assets as MAUI Assets without any manual steps.
See sample app from @javiercn here: https://github.com/javiercn/EsprojPlusAspNetStaticWebAssets (and this ESProj file: https://github.com/javiercn/EsprojPlusAspNetStaticWebAssets/blob/main/LibraryProjectStaticWebAssets/LibraryProjectStaticWebAssets.esproj).
That app shows how to use an ESProj (ECMAScript Project) to include the output JS files as Static Web Assets in an ASP.NET web app. The same pattern could hopefully be used to reference a JS/TS app from a .NET MAUI app with HybridWebView. The .NET MAUI app could reference the ESProj and include those assets as MAUI Assets without any manual steps.
More info on ESProj: https://learn.microsoft.com/visualstudio/ide/reference/property-pages-javascript-esproj?view=vs-2022