Chia seeds - you can substitute it with flax seeds.
Peanut butter - it can be substituted with almond, cashew, or sunflower seed butter.
Nuts - they can be substituted with peanut, almond, cashew, sunflower seed butter, sunflower seeds, chia seeds, pumpkin seeds.
Seeds - they can be substituted with nuts such as almonds, peanuts, pecans, hazelnuts, and cashews.
Can’t eat seeds and nuts - if you can’t eat both of them, you should add more healthy fats into your diet. You could use avocado, add more oil to the salad, and also include more fatty fish such as salmon, mackerel, herring, sardines, and anchovies.