You would need to check with Flir or Boson to see if they make a clip on unit for the Mavic 3 series. It will not be supported/integrated with DJI software
The Mavic enterprise line only comes with the installed payload (camera), you will not be able to swap out cameras. It's either going to be a Mavic 3E (for mapping) or Mavic 3T (comes with thermal, but not very good for mapping). If you are...