Dynamic apps React-Native Expo, based mostly on uncovered iOS/Android variables

I am trying to create a React-Native Expo app based mostly on variables that will or is probably not uncovered in manufacturing/inside releases in both iOS/Android relative shops. I need to have the ability to entry a novel identifier, ex. Bundle Identifier , that is uncovered with a view to toggle sure options. Atmosphere variables would not give the answer I’m searching for as a result of I must manually replace and configure these variables and alter them in line with an app. This offers a way of a extra hardcoded answer.. I am hoping to automate this course of with out having to the touch the codebase an excessive amount of. The answer should have the ability to be utilized in a React-Native Expo app, not a React-Native app.