React Native for iOS Macpro M1

My coders developed a React Native Project which works in Android and he set up the environment for Macpro M1 the Silicon chip but the project itself is not working in iOS. He is not too familiar wiht the some of the change in datpicker etc I am sure that is what it is btu we want the code to work in iOS. The project and all palents calcualtions work in android perfectly. This is for matchmaking and later we will add a new project to make it like Tinder. This project is jsut to make it ready for IOS.