DRIVE platforms are designed to comply with automotive grade requirements and processes for autonomous driving use cases. The platform and the software stack support thermal shutdown for the Xavier SOCs and the board in order to safeguard the components if they exceed the thresholds for the system.
The DRIVE AGX Platform will not throttle at certain levels as with the Jetson platform. Jetson is designed for the embedded market and doesn’t follow automotive grade requirements. It also supports dynamic voltage frequency scaling besides thermal throttling.
Is there a specific reason you are looking at individual thermal sensors? Perhaps if you explain what you are trying to achieve or debug we can better assist you.