My dad has sleep apnea and hated the machine, so talked to a dentist who is knowledgeable about it and got a special mouth guard. Works great for him (and he prefers it far more than the crazy machine).
Also, I have a friend who runs a company here in TO that has another solution called "Provent".
https://www.proventtherapy.com/
It is these weird stickers you put over your nostrils. Again, less intrusive than the machine.