I think you are the best person to judge your parnter's sleep health.
CPAP has been a gamechanger for me, and my partner. It took two years to get it through the health system, (having a box duct-taped to me at the hospital for home sleep analysis was completly useless), duriing which time I developed some chronic health issues. I was so grateful to to finally recieve my machine (the Nose Hose we call it) that the aquwardness and sillyness issues were tiny in comparison to the benifit of getting a good night's sleep.
CPAP has been a gamechanger for me, and my partner. It took two years to get it through the health system, (having a box duct-taped to me at the hospital for home sleep analysis was completly useless), duriing which time I developed some chronic health issues. I was so grateful to to finally recieve my machine (the Nose Hose we call it) that the aquwardness and sillyness issues were tiny in comparison to the benifit of getting a good night's sleep.
Be on the lookout for these symptoms:
https://www.nhs.uk/conditions/sleep-apnoea/
And if being overweight is an issue that's probably where most people should start, which of course is easier said than done.