to be perfectly honest note 20 ultras are missing vapour Chambers and copper piping which allows it to cool down I've never had a phone that over heats and WEFIX technician agreed with me
That may be so, but as i said before, phones easily exceed 20C higher than ambient under load or charge. And your ambient is 35C, leaving only a 10C margin. Even at idle your phone temp is probably resting at 5C above ambient, so 40C.
mine overheats sometimes , but not much , only when i'm playing games , but ive heard that people with note20 ultra& has exynos software phones do heat up .