Why Microsoft.Windows.SDK.NET.Ref not downloaded ?

[sigmarsson]

 <ItemGroup>
    <FrameworkReference Update="Microsoft.Windows.SDK.NET.Ref" RuntimeFrameworkVersion="10.0.19041.25" />
    <FrameworkReference Update="Microsoft.Windows.SDK.NET.Ref" TargetingPackVersion="10.0.19041.25" />
  </ItemGroup>

Why is happening by build with Windows App SDK version 1.1.3 ?