The change is in the morning

Everything you have tried has probably been aimed at the night. Going up earlier, lying there longer, the lavender, the app.

The one change taught here is at the other end of the day. Get up at the same time every morning, seven days a week, including the weekend, and including after a bad night. Then get some daylight on your face reasonably soon afterwards.

That is it. It sounds far too small for the size of the problem, and it is still the highest yield and lowest risk thing you can do on your own.