There is a new demo model on PLECS 4.2 which shows modeling of Wolfspeed SiC devices. Download the latest version of PLECS here - https://www.plexim.com/download,
and open the "Dual Active Bridge Converter" demo model . To view the thermal descriptions, from the menu tab, choose Window > Thermal Library Browser. See the attached images.
Having said that, in the .xml thermal description, the 'Type' of the device is specified. PLECS would only suggest thermal descriptions that would match the device type.