I search the IFHF's online database at ROOTSIRELAND.IE. It has abt 19 million B/M/D and other records for MOST Irish counties. Records before 1863 are increasingly sparse and almost non-existant before 1800. Many B/M/D events either weren't recorded, or the records haven't survived.
I searched for the childrens' DOB in Co. Donegal using a mother's forename of Grace, but found no records at any date for any forename. This infers: 1) the records didn't survive, or 2) haven't been transcribed yet.
Suggest you visit the database, register (free), and opt to be notified (also free) as more records are added (a slim chance at best).