Plane menu? Does it exist?

I noticed that planes in fivem are lacking functionality. Is there a menu or plugin or some kind of method which would allow players to use countermeasures (flares and chaff), drop bombs etc while in planes like in gta online? because I can equip those options when customizing a vehicle but I dont see a way to actually use them

No, not that I know of; as far as I know that is not possible in FiveM.