You are missing the point, it does not need hydrolysates to have a 'controlled breakdown', to enable protein to be more easily digested, or solubility and leakage. Absolutely everything you have put down about free amino acids and peptides does not require hydrolysates.
That was accomplished for years with Multimino, Nutramino, Minamino and various other brand names, Corn Steep Liquor and Liquid Yeast or other ingredients. Soaking and glugging baits after boiling in them did exactly the same thing. They could also be mixed in with the base mix.
The effects are the same.
Hydrolysates are simply formed by adding water, adding an enzyme, or acid to create a smaller particle. A basic hydrolysate is oat milk!