Hi,
Don't know if this will help, but I found a few of my great grandmothers children who died in infancy, buried in the same plot with family through internment records.
Possibly another avenue is baptisms.
In my local area, back in the day if a child was stillborn it would be registered in a book at my local cem. Which could be viewed by appointment, relating to FH.
Just a thought
Cas