The issue you may have is with the big hole he may not have something to push against to break out. Just watch for progress 24+ hrs after external pip.
I did the same thing with my first hatch. That duckling needed assistance hatching later on but I had that duck for many years. So, no, you did not doom them. I would moisten a paper towel and put it over the hole. Then, wait, watch, and assist only if necessary because hatching does not...