Whenever I play sims 4 my laptop overheats, just a few minutes after it opens it gets hot.
Well that's why I do not buy laptops anymore. Because such problem with overheating is not even rare with laptop.
Sims4 needs a lot of power.
a lot of power needs a lot of cooling.
a lot of cooling has a laptop i.d.r. Not.
So: make sure that the cooling is improved and or that less power is needed. So first reduce details.
In a laptop, the fans are quite small, it helps if you put the laptop on such an external fan that cools it down: