To show the Remote Desktop Session Collection you will need to make a change to the Registry.
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Terminal Server\CentralPublishedResources\PublishedFarms\<collection>\RemoteDesktops\<collection>
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To show the Desktop Session Icon, Change the value (ShowInPortal) to 1 from 0.
ou can also rename the Desktop Session Icon name to something more to your liking. To do this, change the value (Name).
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https://community.spiceworks.com/t/remote-app-to-remote-desktop-session/626967/8