You might want to consider an oral appliance. There's no guarantee you will tolerate them or get the desired effect, but the same goes for surgery. Oral surgeries often have dentists who are certified in sleep medicine who can create a custom, medical-grade appliance for you.
I tried everything I could find on Amazon but obviously that crap doesn't work. I can believe something custom made could help but my orthodontist persuaded me the only really solution was surgery or CPAP.
There are specialized dentists that make appliances. My understanding is custom works much better cause fits perfectly instead of having to mold it. If you can, go to dentist that has experience. They are expensive, mine was $3k.
https://en.wikipedia.org/wiki/Mandibular_advancement_splint