Have you tried Time Restricted Eating(TRE) and limiting food intake to daylight hours? Did you notice any changes from that?
As someone who was fortunate to fix a self-created sleeping disorder where I managed to completely f up my circadian rhythms, I wish I had known about TRE years ago. As far as I know it's not (yet) part of the usual list of sleep hygiene/CBT advice, but for me at least it's been the most comprehensive change I've made to my lifestyle that has benefited my rhythms and sleep quality.
As someone who was fortunate to fix a self-created sleeping disorder where I managed to completely f up my circadian rhythms, I wish I had known about TRE years ago. As far as I know it's not (yet) part of the usual list of sleep hygiene/CBT advice, but for me at least it's been the most comprehensive change I've made to my lifestyle that has benefited my rhythms and sleep quality.