I wish someone would publish a guide for MacBooks based on palm rest idle temperature, having a hot sweaty palmrest (especially in warmer climates) bugs me more than having a bit of fan noise and if it was clear and transparent maybe Apple would design better thermal solutions.
I have MBP 16" with the 8-core i9, palm rest sensors show they are at 32C and 30C at my regular usage (browser, IDE, slack and other apps). However i don't use external screen.