Mod to disable autonomy with babys/infants/toddlers?

I think you could do it with MCCC. You need MC Tuner module. It includes an object scanner to find autonomous interactions and allow the player to disable the autonomy of those interactions. You just have to do it one by one for every interaction you want to disable.

Here is guide how to do it:
https://deaderpool-mccc.com/#/doc/mc_tuner

This might not be the easiest way but it is one option you could try, at least if you already use MCCC.