So it's made of shit, right? And shit is an animal product. But barring a night of drinking or a particularly aggressive burrito, shitting does not harm the shitter; it's beneficial and required. Also the animals in question can and do consent, does that make it vegan?
To the best of my knowledge, there are no mass market breast milk products, and that would be weird and ethically questionable if there were. Commercial vegan cheese and yogurt is made from plants, I've got cashew milk yogurt in my fridge right now. Maybe there's some weirdo making breast milk yogurt out there but largely that's not a thing.