A smaller Bi-Zygoma to Midface height ratio is easy to understand as a longer midface height compared to Bi-Zygoma. A longer midface indicates proper facial growth until middle adulthood (Carolyn R et al, Department of Anthropology, Boston University, USA ). In attractive faces, it is somewhat common to have a longer midface (S.C.Rhee, Teuim Aesthetic Plastic Surgery Clinic, South Korea ).
References
Carolyn R et al, Department of Anthropology, Boston University, USA https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0240284
S.C.Rhee, Teuim Aesthetic Plastic Surgery Clinic, South Korea https://pubmed.ncbi.nlm.nih.gov/28722243/