My husband has chronic obstructive sleep apnea, he has a CPAP that he wears diligently every night but he also has insomnia mostly from working nightshirts years prior that messed his circadian rthyum up. He doesn't eat right due to ARFID, which in turn doesn't help the insomnia. I've told him hundreds of times over the past 2 years, you need to seek professional guidance from a healthcare professional, over either the sleep apnea mask not being correct fitting, the disordered eating which doesn't allow for proper nutrition as he just lives off chicken sandwiches with marmite, peanut butter, crisps and pizza... and I told him to talk to the GP about sleep help. He shuts me down even though he can barely function, complains endlessly all day everyday about how terribly he slept. On top of all of this we have a 2 year old, whos sleep is actually decent! Little man sleeps through and when he doesn't I go get him back to sleep, but yeah.
My husband is 31, for context and we have been together for 14 yrs, the sleep apnea was first detected 1 year after our son was born. DH works fine from home, he does need to nap though in mid afternoon and sometimes he misses out on social stuff at the weekend because he is so low energy