i am not saying the issue is completely resolved. its better now. however, i agree with all the people who has posted their concerns here and Samsung should take time to review this and give us a proper support on this. THIS IS NOT AN ISOLATED ISSUE....
I was having the same issue right after I purchased the S20 FE 4G. Later then I browsed and found out that reducing the screen refresh rate from 120hz to 60 hz will help us reduce the heating issue. Truthfully, it worked very well and battery backup ...