Sleep apnea is a structural issue, either soft or bone. CPAP helps, but it doesn't address the root cause. Fixing it is a matter of airway geometry, with many obstructions along the way. Bodybuilders or wrestlers, otherwise in good health, can suffer from OSA because of too much muscle in their neck. You may not know it, but your tongue may be tied. It is one of many possibilities causing OSA. I made this: Do I have…
Central Sleep Apnea exists aswell.
Sleep apnea can be a disqualifying condition for pilots, so I like to be 1000% certain and have plans A, B, and C ready to go before seeking treatment.