She's shared a lot about her food herself, apparently. That she is a big fan of fish, avocados, green smoothie, and toast with salt. But not a fan of oils, dressings, strong flavours. She'd prefer to have shrimp in lime juice with avocado, or some grilled salmon with steamed veg than anything else. Enjoys sprouted grain cereal for breakfast, or toast with smashed avocado and green smoothies. She's very thin, obviously, and always has been, but if she is an ARFID sufferer then she is managing it well, actually. Because a lot of people with that can only manage beige food and she's getting food from all the major food groups, including healthy fats to replace the oils and butters she doesn't like and plenty of fresh produce. Again, if her ED is anorexia, that she is maintaining her weight and managing to eat high calorie foods like fatty fish on a regular basis she is probably in quite stable recovery, especially if she is eating regular meals and not ever skipping dinner. So whilst I don't think this diet is normal I'm not sure it's automatically problematic either. Some people prefer to eat foods that are familiar to them and take the anxiety out of food by eating the same things regularly. It's really common to eat the same breakfast every day, and it may be that she feels more adventurous at lunch time. Who knows.