Will the iPhone 16 use graphene heat sink to solve overheating issues?

Rumors suggest that the iPhone 16 may use a graphene heat sink and a metal battery case to promote better heat transfer. This follows complaints by iPhone 15 users about overheating, which Apple fixed via software, but the iPhone 16 is rumored to have a hardware solution, too. Apple associated the overheating with poorly optimized software and issued a software fix, but more effective cooling may also help.