I think a better question is 'how do I fix my throttling CPU'.
Run the laptop elevated off the table for better airflow. Open up the laptop and repaste the GPU. Apply an undervolt with Intel XTU. Sometimes manufacturers lock this out through BIOS updates (mine did), in which case, roll back.
If you've repasted and applied the maximum stable undervolt, and it's STILL throttling, run the fans at 100% when you game. You could also invest in a stand that has fans built in to it.