the failure of one or both AoA sensors is not often part of the simulator training curriculum
Probably because the effect of such a failure can vary significantly, hence it is not a simple scenario with a clear procedure to train in the sim.
AoA is not directly indicated, AoA is not directly used by the pilot during normal or ermengy procedures.
AoA failure is implicitly trained as some of the failures which can be caused by AoA failure are trained.
If you only have 2 AoA, failure of one or failure of both should not make much difference, if both do no longer agree, yo do not know which one is faulty, so you have to assume both have failed.
We even already had the case that 2 out of 3 did fail (freeze at a safe value), so the computers decided that they must be correct, and the single different one (indicating an unsafe value) must be at fault...