That would be a very severe correction if you were already approaching from the left of the centreline?
Based on the photos quite clearly showing a feathered port engine, I would dare to suggest that the right wingtip struck the ground/runway during the inversion sequence due to an engine out at go-around, and was not the cause but already an effect.
Am not familiar with the Metro, anybody in the know: is there a speed limit below which maximum aileron force is insufficient to counter the torque imbalance caused by a single engine going from idle to 100% at maximum acceleration ?