Just an update and this is a fresh batch (that needs to soak for a few hours), but chia seeds while not a perfect substitute for tapioca do turn into something similar after soaking them in your tea mixture (like small tapioca pearls with a strawberry seed in the middle). Worked out pretty well. This mix was made with Oolong tea, Skim Milk, and two tablespoons of vanilla almond sugar free coffee syrup.