https://www.ewg.org/foodscores/ might help you target specific brands. Many soy milks count as ultra processed because the additives are (calcium, vitamin b etc.). Less healthy than the unadulterated brands? I think the research is still out on that.
(and cow milk often has similar additives, so this isn't supporting the original claim)
500ml of soy milk has almost twice as many protein and tons of nutrients too. It requires like 5% as much water to produce, 0 antibiotic, and no animals
And when factoring in the negative externalities extremely expensive. When factoring in the moral aspect considering the way the cows are treated it’s an immoral product.
(and cow milk often has similar additives, so this isn't supporting the original claim)