Will a helmet correct ear shifting in babies with moderate plagiocephaly?

My 8 month old had a helmet consultation and they diagnosed him with moderate plagiocephaly. The 360 view shows ear shift and a flat spot on the right side of his head. The OT at the appointment said the helmet could help a little with his misaligned ears. She said the helmets main purpose is help with fit of hats, sport helmets and glasses.

Cephalic index 85.8, CVA 7 mm, CVAI 5mm

Any research on improvement of ear shift in a 8-9 month old?

Is helmet therapy successful in 8-9 month olds?

If you have any experience with orthotics is ear shifting usually corrected?

Can ear shifting get better over time without a helmet?