Eating the same food all the time is just one example of repetitive and restrictive behaviors. You don’t have to have that exact behavior, that trait could be manifesting in different ways. I’ll try new foods and I don’t like eating the same food day after day, but I do have a sort of weekly pattern. I like pizza on Fridays, etc. But overall my repetitive patterns manifest outside of eating, an example is that I listen to Seinfeld episodes as background noise on a daily basis. It’s also okay for those patterns to change over your lifetime.
I seem to do better with higher protein intake. I also try to eat a gummy multivitamin each day to help with any deficiencies that may come from a less than well balanced diet.