Welcome to Ireland Reaching Out and apologies for the long delay in getting back to you.
Unfortunately I haven't been able to locate any further records that migt fill in those gaps for you.
It might be a good idea to keep an eye on the Early Birth and Marriage Index. It is updated regularly and if your ancestor doesn't appear now, they may in the future.
I wanted to invite you to add your ancestor's details to our XO Chronicles. You can learn more about it HERE and it might be another avenue to consider so that your ancestor's details can be seen by others.