Preview Handler with MSIX Packaging Tool?

Can anyone point me to a full example of an MSIX manifest file with a working preview handler for a custom file extension?

I have developed a Windows exe and a dll preview handler for a custom file extension. I have a working Inno Setup installer that creates file associations for the file extension and assigns a preview handler so that the files can be previewed in Windows Explorer. I'm then using MSIX Packaging Tool to create an MSIX from the Inno exe installer. It mostly works and file associations are created correctly for the custom file extension. However, the preview handler doesn't work. Windows Explorer just shows 'Preview Unavailable' in the preview pane.

I have found this topic, but it seems unresolved. Was this issue ever solved? 
Preview Handler in MSIX | Microsoft Community Hub
From this I have found that entries may be missing from my manifest file for desktop2:DesktopPreviewHandler and com:SurrogateServer. However, I am new to MSIX and my efforts to add them in based on the documentation (link below) only results in an 'Unable to parse manifest' error from the MSIX Packaging Tool. The log file isn't much help showing only '[Error] System.Runtime.InteropServices.COMException'.

https://learn.microsoft.com/en-us/uwp/schemas/appxpackage/uapmanifestschema/element-desktop2-desktoppreviewhandler

Can anyone point me to a working example for a manifest file for a preview handler for a custom file extension, or a good tutorial?

Here's my manifest file (with specifics renamed).

<?xml version="1.0" encoding="utf-8"?>
<Package xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10" xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10" xmlns:uap2="http://schemas.microsoft.com/appx/manifest/uap/windows10/2" xmlns:uap3="http://schemas.microsoft.com/appx/manifest/uap/windows10/3" xmlns:uap10="http://schemas.microsoft.com/appx/manifest/uap/windows10/10" xmlns:desktop2="http://schemas.microsoft.com/appx/manifest/desktop/windows10/2" xmlns:desktop7="http://schemas.microsoft.com/appx/manifest/desktop/windows10/7" xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities" IgnorableNamespaces="uap uap2 uap3 uap10 desktop7 rescap">
  <!--Package created by MSIX Packaging Tool version: 1.2024.405.0-->
  <Identity Name="CompanyName.AppName" Publisher="---------------------------------------" Version="1.1.1.0" ProcessorArchitecture="x86" />
  <Properties>
    <DisplayName>App Name</DisplayName>
    <PublisherDisplayName>Publisher Name</PublisherDisplayName>
    <Description>App Name</Description>
    <Logo>Assets\StoreLogo.png</Logo>
    <uap10:PackageIntegrity>
      <uap10:Content Enforcement="on" />
    </uap10:PackageIntegrity>
  </Properties>
  <Resources>
    <Resource Language="en-us" />
  </Resources>
  <Dependencies>
    <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.17763.0" MaxVersionTested="10.0.22000.1" />
    <PackageDependency Name="Microsoft.WindowsAppRuntime.1.4" MinVersion="4000.1010.1349.0" Publisher="CN=Microsoft Corporation, O=Microsoft Corporation, L=Redmond, S=Washington, C=US" />
  </Dependencies>
  <Applications>
    <Application Id="EXENAME" Executable="VFS\ProgramFilesX86\App_Name\AppName.exe" EntryPoint="Windows.FullTrustApplication">
      <uap:VisualElements BackgroundColor="transparent" DisplayName="App_Name" Square150x150Logo="Assets\APPNAME-Square150x150Logo.png" Square44x44Logo="Assets\APPNAME-Square44x44Logo.png" Description="App Name">
        <uap:DefaultTile Wide310x150Logo="Assets\APPNAME-Wide310x150Logo.png" Square310x310Logo="Assets\APPNAME-Square310x310Logo.png" Square71x71Logo="Assets\APPNAME-Square71x71Logo.png" />
      </uap:VisualElements>
      <Extensions>
        <com:Extension Category="windows.comServer">
          <com:ComServer>
            <com:SurrogateServer>
              <com:Class AppId="64644512-C345-469F-B5FB-EB351E20129D" SystemSurrogate="PreviewHost" />
            </com:SurrogateServer>
          </com:ComServer>
        </com:Extension>
        <desktop7:Extension Category="windows.shortcut">
          <desktop7:Shortcut File="[{Common Programs}]\App_Name\App_Name.lnk" Icon="[{Package}]\VFS\ProgramFilesX86\App_Name\AppName.exe" />
        </desktop7:Extension>
        <uap3:Extension Category="windows.fileTypeAssociation">
          <uap3:FileTypeAssociation Name="ext">
            <uap:SupportedFileTypes>
              <uap:FileType>.ext</uap:FileType>
            </uap:SupportedFileTypes>
            <uap:Logo>Assets\ext.png</uap:Logo>
            <uap2:SupportedVerbs>
              <uap3:Verb Id="open" Parameters=""%1"">open</uap3:Verb>
            </uap2:SupportedVerbs>
            <desktop2:DesktopPreviewHandler Clsid="64644512-C345-469F-B5FB-EB351E20129D" desktop10:DisplayName="AppNameEXTPreviewHandler" />
          </uap3:FileTypeAssociation>
        </uap3:Extension>
      </Extensions>
    </Application>
  </Applications>
  <Capabilities>
    <rescap:Capability Name="runFullTrust" />
  </Capabilities>
</Package>