so just found that airdrops is not listed in any of the filters for radar

hi, it's there. I see the button and it is showing the airdrops for me.

"Show Button - Airdrops": true,

 "GUI": {
    "Move Arrow Text": "↕",
    "Offset Min": "185.044 91.429",
    "Offset Max": "230.956 110.571",
    "Color On": "0.69 0.49 0.29 0.5",
    "Color Off": "0.29 0.49 0.69 0.5",
    "Show Button - All": true,
    "Show Button - Airdrops": true,
    "Show Button - Bags": true,
    "Show Button - Boats": true,
    "Show Button - Bradley": true,
    "Show Button - Box": true,
    "Show Button - Cars": true,
    "Show Button - CCTV": false,
    "Show Button - CargoPlanes": false,
    "Show Button - CargoShips": false,
    "Show Button - CH47": false,
    "Show Button - Collectibles": false,
    "Show Button - Dead": true,
    "Show Button - Heli": true,
    "Show Button - Loot": true,
    "Show Button - MiniCopter": true,
    "Show Button - MLRS": false,
    "Show Button - NPC": true,
    "Show Button - Ore": true,
    "Show Button - Ridable Horses": true,
    "Show Button - RigidHullInflatableBoats": true,
    "Show Button - Sleepers": true,
    "Show Button - Stash": true,
    "Show Button - TC": true,
    "Show Button - TC Arrow": false,
    "Show Button - TC Turrets": true,
    "Show Button - Traps": true
  },

yes button shows . but its not showed in game as you can see in picture i uloaded .... i see now the image is messed up ill post another one

I was able to reproduce this issue and it will be fixed in the next update