If the snap doesn’t provide a desktop shortcut and you think it should, maybe raise the issue (either here, or directly with the snap’s authors).
If on the other hand they do provide a desktop shortcut, but your desktop environment isn’t picking it up, you need to look into why. Hopefully it follows the XDG recommendations about paths, and all you need to do is add /var/lib/snapd/desktop to XDG_DATA_DIRS (see Snaps not appearing in Debian9 Stretch LXDE menu (Not Wayland Bug) for more).