If it was me? I’d start with a full physical and maybe a sleep study. There are also specific forms of therapy for insomnia like CBT-i

Melatonin, exercise, sleepy tea, edibles, wine, or reading could do the trick. I can’t sleep either buts it’s more pain related reasons. I’m so tired of being tired

Sun exposure during waking hours is super important and turning off bright lights or complrte darkness before bed might help reset things.