That's not going to happen, ever. If israel could be trusted to treat prisoners properly, they might, but we have been hearing all the horror stories about how israel treats Palestinians in their jails, and that's just Palestinian children held without trial, without access to a lawyer, without even a specific charge.
When israel treats child prisoners so cruelly, Hamas knows that if they surrendered their treatment would be a thousand times worse, so for them it's a fight to the death, taking as many israelis with them as possible and so far managing more than a few of those.