Gatekeep at the grocery store. It's easier to resist eating a full tub of Oreos by deciding not to buy them in the first place

It's easier to moderate what platforms you use than it is to resist their affect on you. Restrict where and how you are exposed to short form video and what kinds of social media you use

Also, take magnesium glycinate, but not on an empty stomach. Basically everyone with ADHD has a magnesium deficiency that makes the symptoms way worse