What happens to unbaptized children. Surely Our Father would not damn them to hell for the failings of their parents and the society that raised their parents and their parent's parents.
Oh Lord, please do not damn unbaptized children to hell. It is too cruel a thought.
No man or woman or scholar or guesser or whoever can tell you what happens with unbaptized children, nor even with baptized children for that matter.
The Potter has no obligation to explain to the clay , and in the last 2000 years The Alimighty Creator has not explained to His 'clay pots' (men) , and is not at all likely to do so now.