According to the Soy bean producers of North Carolina, the soymeal is a by product of the soy oil production, where a small portion is used for Tofu and Soy milk and the majority becomes animal feed: https://ncsoy.org/media-resources/uses-of-soybeans/
So all of the soy protein given to animals would indeed be digestible by humans.
You do realise it’s waste product not suitable for human consumption
For example waste spy product from the production of your soy milk which also uses a ton of water and drives deforestation
The farms also kill farm pests with use of farming machines, pesticides and shotguns
According to the Soy bean producers of North Carolina, the soymeal is a by product of the soy oil production, where a small portion is used for Tofu and Soy milk and the majority becomes animal feed: https://ncsoy.org/media-resources/uses-of-soybeans/
So all of the soy protein given to animals would indeed be digestible by humans.