Trying to make a setup for PMDG737, I find a request feature. To have a repeat option for an action.
Example for PMDG, you have to click twice the left button on the landing gear button to lower the gear.
So if I put for the "gear down" action, "simulation control" PMDG737 "Gear lever" single click left mouse button, it's only unlock the gear not down, it have to be done twice.
If there was the repeat option (with a timer), I think we could use it to repeat the action twice with half a second between the two action.