How can I get a file into an app bundle and read it, in .NET MAUI?

Question

I have a .mmpk file (used by ESRI for ArcGIS). In a .NET MAUI project in Visual Studio for the Mac, I dragged the file into the Resources/Raw directory. Its properties are Build Action: MauiAsset and Copy to output directory: Always copy.

When I try and read it I get this error:

ArcGIS Maps SDK: Load Error: MobileMapPackage
	System.IO.FileNotFoundException
	File not found: /data/user/0/com.companyname.displayamap/files/MahouRivieraTrails.mmpk

I am trying to read it using this code:

string pathToMobileMapPackage = System.IO.Path.Combine(/*Environment.CurrentDirectory*/FileSystem.Current.A, @"MahouRivieraTrails.mmpk") ;


MobileMapPackage mahouRivieraTrails_MobileMapPackage = new MobileMapPackage(pathToMobileMapPackage);

await mahouRivieraTrails_MobileMapPackage.LoadAsync();

this.Map = mahouRivieraTrails_MobileMapPackage.Maps.FirstOrDefault();

I've tried several approaches, as you can see.

Why isn't this working?

Any help would be hugely appreciated, as I am trying to avoid having to just give up and switch to Swift.