I had a pretty terrifying experience feeding during this time with our 1.5 yo, so based on my experience I would definitely wait. Eating during shed ultra-dehydrated him and it was the worst shed he's ever had! I actually ended up taking him to the vet because I couldn't tell what was going on and they gave him fluids to help but she was able to see his dehydration just by looking in his mouth.
I’m very sorry that happened. Thank you for telling me this!