Disable Flatpak Runners?

Is there a way to prevent Lutris from using the Flatpak version of runners? For example if you have the Flatpak of PPSSPP installed on your system is there a way to stop Lutris from recognizing and using it as a runner. I know there is the “Hide from Side Panel” option however that does not hide it from places like the drop down menu for creating a new game.