The RC-controller will not update to the latest Flysafe database, you will need to use DJI assistant 2 (Comsumer), connect via USB C to your computer and the software will recognize the drone and do the latest update version 01.00.01.38 Aircraft...
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...