Yes I bought a power supply for the fan and in the UI it is switched on.
However... I figured out the problem. The fan is getting power but is stuck against the fan shroud so it's not letting the fan start properly. If I bump the fan with an object to get it spinning it runs fine... although you can hear the fan hitting the shroud while it runs.
The camera and temps all operate fine with the fan on. Just need to figure out how to fix the shroud.