Another way and more details:
Add a launcher
Right-click on taskbar > Panel > Add New Items… > Launcher > + Add > Close
Then an empty blind launcher added on the most right part of the taskbar (after the user account).
Right click on that new launcher > Properties > + > choose your wanted application from AppVMs.
Remove a launcher
Right click on that new launcher > - Remove
Move a launcher
Right click on that new launcher > → Move
In general, in the taskbar, I move my launchers on the left of the Workspace Switcher.