Skull binding maybe? When I was younger, I heard of a practice among Muslims of Pakistan (and maybe India) where kids' heads were re-shaped into a more oblong shape.

It's an old practice apparently:

For thousands of years, various communities around the world have bound cloth or pieces of wood to the pliable heads of infants to artificially elongate or otherwise shape their craniums. Neanderthals living 45,000 years ago show the evidence of such skull shaping, and the practice persists among some societies today.

https://www.smithsonianmag.com/smart-news/parents-have-been-reshaping-their-kids-skulls-45000-years-180957343/

In another culture, neck rings to elongate necks are common for example. In China, there was a practice of binding feet of women to reduce foot size. There's a tribe in Africa that elongate their lower lip by a lip plate.