Smart view is just a power hungry app in general, it's super resource intensive and even my s22 ultra can feel toasty after a while of using smartview or dex. So while using the phone, make sure that there are too many other apps open that you don't need, turn off wifi if you aren't using that either and just use data or the other way around depending on what you're using also DONT charge your phone while doing it, that would be a ton more heat going through if you did both at the same time. If it really worries you, you can by a fan for your device to keep it cool. I personally have a razor mobile gaming fan to keep my phone cool when the las vegas desert weather kicks in and starts torching my phone
