I’m not on a stimulant beside caffeine. But I have noticed a similar issue. 3 things I do to help:

1. Plan for it. I intentionally plan for my meals to be larger as the day progresses so dinner is the biggest.
2. I give myself “free” things to eat with no guilt. If I want to eat a giant bowl of cooked broccoli, no worries.
3. Don’t buy things you will dopamine crave. If you have junk food at arms reach, you will eat it. I try to stick up on protein bars and fresh fruit.