pe reivers

I think, part of the piston skirt broke off first, probably during the start procedure after the prop hit. (coincidence??)
the wrist pin seems to have failed all at once due to engine blockage, hard to see well from the picture. The break mode seems to indicate too hard a pin, like Downunder noticed. The break angle seems to suggest piston locking in top dead centre, maybe due to a skirt part entering the exhaust port. Need to examine the engine closer for full analysis.
This damage is regardless of rabbit hole strike. A prop hit at idle will never cause internal engine harm like a broken gudgeon (wrist) pin or piston skirt damage. Over revving maybe?

Use of the starter caused the later damage like wrist pin failure, head indentations and more piston, damage.