[When I hear of a company even mentioning this as food, that company, and everything associated with them, gets crossed off my list. I’m sure they’ll try to sneak it in somewhere, but my spidey sense is pretty good about such things.]
Soy fillers are used in all kinds of things, including beef patties and chicken nuggets. They sell very well. The key is the products taste like meat and are not only not more expensive, they are cheaper than products without the filler. That’s the niche - a lower-priced product, not Impossible Burger patties 2x the price of the real thing.