Please pray for me, the doctors have recommeneded I get surgery or a CPAP for it, and I currently dont have a guaranteed job where I would make enough money for either. I think it started right after I got covid in 2020, though it could also be due to my allergies.
The soft palate can be improved. Our skulls/the position of our teeth have been made more "narrow" by eating processed foods and _not eating_ the sort of foods we had to "work for" back in the day (dried meats, tubers/roots, strong grains, etc.). The soft palate can be restored to its optimal wide state by exercising it and also eating traditional foods. On the "eating traditional foods" part of this, please check out the Weston A Price Foundation and his books, documentaries, etc. Natural eating will restore our palates, our teeth, and our overall health.
As for Mewing, it's a form of exercise that can accelerate the restoration of a wide palate. It's not specifically an exercise to widen the throat, etc. so as such one might state that it's not really an anti-apnea treatment. But, in practice, it is. It creates more space in the mouth/skull for the tongue and for breathing.
For OP, I _highly_ recommend that you take the advice I see on this page so far (drop weight, improve nutrition, cut out junk, prioritize sleep, etc.). But mewing can be a very effective part of this story.
DO NOT go for the surgery right away, imo. IANAD. But, in my understanding, the surgery usually begins with "OK so we start by cutting out your tongue and then we move it." Yeah FUCK NO. That is a very invasive approach. Use your body to fix your body first.
Also, doctors view the CPAP as a universal good, it seems. I don't think most doctors would think that CPAP has any side effects. I think those doctors are very wrong. Having air pushed at a constant speed/pressure into one's lungs does not, I suspect, do anything good for one's esophagus, lungs, etc. And if the air has "bugs" (bacteria, etc.) in it, it might enable a deep lung infestation. Just a suspicion of mine. Anyways ...
https://www.youtube.com/watch?v=VmbV-0x11TE