Consume Product

I think it's in the realm of mystery but there has been a Catholic belief in the idea of limbo: https://www.newadvent.org/cathen/09256a.htm

I guess it's important to note that the idea of limbo was in hell, but because the unbaptized children had not chosen to sin of their own will, they were not thought to be tormented, only to be separated from God (which is still a big deal). But the problem is, they also didn't choose to do good, so it's hard to think heaven is a fit location for them. Baptism is also traditionally thought to remove original sin, so without that it's also thought they are not fit for heaven. But they also did not choose evil, so worse punishments are not fit for them either. So they were thought to have a specific place in hell that wasn't quite the place of bad punishment like we typically associate with hell, but nor was it the paradise of heaven.

Honestly it might simply be best to trust God is in control of the matter, and to only focus on doing what God asks of us (to baptize those we are to baptize, pray for the unbaptized, and so on)