Eating animal-based protein is not a requirement when using MetPro. If you are vegetarian or vegan, it will just take a bit more creativity to meet your protein needs with plant proteins alone. That said there are plenty of other foods you can use to help you fulfill that macronutrient.
When using your meal builder, search the compound food sections for things like beans, lentils, nuts/seeds, and tofu. These foods are in a separate list because they count towards another macro in addition to protein (see our FAQ about compound foods). Protein powder can help round out your protein allotments as needed.
You may find that selecting the "reduced" protein setting on your profile helps the protein in your plan feel more realistic and attainable. However, if your goal is to build muscle mass or improve performance, you may need to get creative to hit higher protein levels without exceeding your carbohydrate allotment.
It may also be helpful to know that there are only a few minimally processed food items included in MetPro's food lists. You will find tofu, tempeh, and seitan; but not artificial meat replacement products. Working one-on-one with a coach can help you navigate a more customized plan that best suits your needs.