Actually the RTK is not great on the M3T for survey or mapping. The Mavic 3T does not have Time Sync, which is needed to get the precise coordinates and elevation written to each image. When mapping with it, you will get images with accuracy values in Pix4D or Metashape, but they will not be centimeter accurate.
The Mavic 3E and Mavic 3M both have Time Sync and therefore can create accurate maps and models.
You can always use ground control points if you needed centimeter accurate maps with the Mavic 3T.
For the Mavic 3T, the RTK module is for accurate positioning only. I use the similar RTK module on my
Mavic 2 Enterprise Advanced and I use it to run precise repeatable inspections with images and videos. It works great when overlaying and comparing videos and images.