I don’t believe that the Church has specific rulings on burial of children loss to miscarriage. I’ve heard of stillborn children being given simple funerals or prayer services and a burial, but I’ve never heard of how early miscarriages are handled.
My husband and I decided prior to having children that should we loose a child to miscarriage, we would hope to have the remains cremated, but I don’t know if that would have been possible or not.
Hopefully someone can give you a more official answer. In any case, if you’re suffering a miscarriage, my prayers are with you.