Don't think Bailly does a whole lot wrong, Valencia is the main culprit, either way it would be a blow.
But I'd appeal that personally, Bailly raises his arm but doesn't even touch his face, maybe his ear if anything.
https://streamable.com/o9urh
Here's the incident. He pushed Guidetti, Bailly threw the punch. I clearly missed what Valencia did, can someone tell me?