Do you drink coffee during the day? If yes just quit coffee completely, try replacing it with matcha. See if you like it.

Then you will have energy during the day, but when it is time to sleep you will not have troubles.

You train yourself a lot, try not to train yourself in the 3 hours before going to sleep.

Screens might also be a factor, just use nightlight mode on the laptop or phone after 21:00.