Is it possible to add the option "add to favorite" into a context menu of an Appimage file on 20.04?

Question

I wonder if it possible under 20.04, to modify the context menu of a launched appimage application to add "add to favorites" choice?

The complete .desktop which is quite short is:

[Desktop Entry]
Version=1.1
Type=Application
Name=REPETIERHOST
Comment=SLICER I3MM
Icon=/home/manuh/Documents/AppImages/RepetierHOST_SoftWare.png
Exec=/home/manuh/Documents/AppImages/Repetier-Host-x86_64-2.1.6.AppImage 
Path=/home/manuh/Documents/AppImages
StartupWMClass=Repetier-Host V2.1.6
Actions=
Categories=X-GNOME-Other;