EDIT: As a little edit it might be a good idea to add to the general settings as a tick box with the other “Double tap to action gear” tick for yes untick for no to keep as a single tap.
This is the same concept as another feature request to double tap to disengage autopilot settings but applied to the landing gear by double tapping the gear button. I’m not sure how many people encounter this but I have lowered the gear during cruise by mistake before (and again today on the super long haul) and only caught it just in time before the aircraft slows down too much. A few times I haven’t been so lucky and plummeted into the sea with a string of speed violation to follow, which isn’t great.
I think this would be a great feature to have as you need to be able to double tap and actually engage the gear action intentionally - in a real aircraft you have a lever to pull down, which you can’t really do by mistake. I think it would give it a bit more of a chunky “action” feel as well if you have to double tap the gear button.