Yes, the Matrice 4T thermal camera is radiometric.
Keep in mind though, the DJI spec RJPEGs it produces cannot be used in FLIR Tools or FLIR Studio.
Also the DJI spec RJPEGs cannot be used in Agisoft or Pix4D for a radiometric orthomap unless they are converted to TIFF. Drone Deploy though, will take them as is and make them into a radiometric orthomap.