In real life you steer with the TBM’s rudder pedals, as such it’s the same in the simulator, i.e. whatever is assigned to the yaw axis.
“Nosewheel tiller” axis should be used on planes that have exactly that, a tiller. I guess the default planes have a convenience feature that it also works on planes where a tiller does not exist, e.g. the 172. The Hot Start TBM is more about realism than convenience.