I do OMAD have my meal during dinner time. Keeps me from nighttime snacking. It does mean that my workouts will be during the end of my fasts so that can sometimes be a bit of a mental barrier but other than that this strategy has worked for me.
It takes about a month to reprogram the brain and ghrelin release, so sometimes its just time.
But also make sure that you eat enough protein and nutrients during the day. If you cut calories and try to reprogram the eating window at the same time it makes it exponentially harder.
I found that upping my protein massively helps my sleep. But I also second another commenter’s suggestion of moving your eating window to the evening. I also struggle at night. I do stop eating 2-3 hours before bedtime, but I love my dinner!