The calf's upper lip looks normal. It is the premaxillary bone that looks underdeveloped. She does not appear to have a severe enough underbite to affect suckling, however, even a slight underbite can seriously affects the ability to bite off foliage when the animal begins eating grass. You do know, don't you that hundreds of pesticides fall on the foliage in rain and snow and into the surface water everywhere. And of course they are in the air everywhere. The white-tailed deer tested in Minnesota in forested areas far from farm fields had higher levels of Imidacloprid in their spleens than the white-tailed deer deliberately given Imidacloprid in the water they drank in a study done in SD that received international attention.
https://www.nature.com/articles/s41598-019-40994-9 The fawns born with underbite or overbite and those that died soon after birth had higher levels of Imidacloprid in their spleens than the normal fawns. If all domestic animals born with underbite or overbite were reported to the Agricultural Department, maybe something would be done about the Imidacloprid.