Your child has gone quiet, still, unreachable. This is the nervous system other response to overwhelm: not explosion but collapse. They may stare blankly, go limp, refuse to speak or move. This is not defiance or manipulation. This is a young nervous system that has flipped into its protective withdrawal mode. Pushing, prompting, or demanding will deepen the shutdown.
I am right here with you. You do not have to do anything. I have got you.