If you get one of the watches or other devices that can do continuous SpO2 monitoring (blood oxygen) overnight, then it should be possible to detect any form of

If you get one of the watches or other devices that can do continuous SpO2 monitoring (blood oxygen) overnight, then it should be possible to detect any form of severe sleep apnea just by looking for significant drops in SpO2. The proper kits look for more than that of course, but SpO2 on its own is actually a pretty good indicator.