Macbook Pro 16 Inch Overheating
Unfortunately, the fault t is a bad design concerning the heat dissipation of the laptop. Especially if you use the display with an external monitor it gets very noisy and hot. Maybe they can solve it with a software update by reducing the voltage of the cpu and gpu. Please report this problem to Apple. If you look on google there is really a lot of people complaining about it.
(Tip: you should charge your laptop on the right side).