Protein powder and Synthroid

TLDR: Will protein powder or protein shakes interact with levothyroxine?

I’m 33(F) and I’ve been on levothyroxine for a few years now for Hashimotos. All is well with that. But I recently started Invisalign and you’re supposed to wear them 20-22 hrs a day and only remove them for meals and brushing/flossing. I’m having difficulty meeting that threshold because I have ADHD and forget about my meal randomly. So I wanted to replace my breakfast (usually oatmeal or an omelet) with a smoothie or protein shake. But an endocrinologist told me it could interfere with my levothyroxine absorption just like vitamins do. She said lunch might be a better time for protein shakes. Is there any real concern of interference?