@knowncolor sure that helps! Sounds like I haven’t used to the content manager yet 
Further to the question, to my knowledge, only admin users could access the content manager in a production environment, but in my case, I don’t even want their “admin” user (which should be under the “users” category in Strapi’s language) to mess with the other fields in the collection type, I want them to just able to add and remove. I probably would make a custom inventory managing frontend, but with this “add new fields” function. How could I go further with this “add components to dynamic zone” setup?