[threecheese]

I’m sure it has occurred to you to try CPAP; was it ruled out by your pulmonologist? If the pressure is incorrect enough to wake you up gasping, “it ain’t workin’”. As a CPAP user, being able to access the hidden control menu for my device was key: it allowed me to change the pressure, the ramp, and other runtime configuration that really improved my experience - which improved my compliance and thus my energy level (and that small thing of not being at risk of sleep-death!). You have to press a certain combo of buttons to access, maybe your APAP has something similar?