No need to use pectin as the chia seeds will thicken the jam.
Or use chopped fruit such as blueberries, blackberries or strawberries (or a combination). If using peaches or pineapple, add a sprinkle of extra chia seeds to thicken the jam.
Chia Seeds Jam is not safe for canning.
Find it online: https://simplygreatrecipes.com/raspberry-chia-seed-jam/