CopyQ global shortcut not working on Ubuntu 21.04
CopyQ clipboard manager global shortcut to show/hide main window does not work on Ubuntu 21.04 (doesn't work under Wayland windows manager)
Workaround is assigning a shortcut in Gnome
Open Setting from the top bar, select keyboard shortcuts
Scroll to the bottom and hit "+"
Enter the name of your choice, type copyq -e "toggle()"in the Command field
Hit Set Shortcut and press your favorite keys.
To have the CopyQ window focused using the workaround suggested by quinta, try checking "Always on top" in CopyQ settings, General.