Hi, I'm new to coding. I wanted to ask a few questions as I'm currently building an app (Xcode - SwiftUI). Apps such as Just-Eat and Amazon have reviews/ratings within the app for customers to submit. Once customer submits a review, is the overall score automatically updated via a Xcode/SwiftUI function or is there a separate model outside of Xcode to automatically update/feed the app? If the latter, how does this live feed the app without any official update in the App Store? Sorry if the above doesn't make sense but I guess it's clear to see I'm a newbie :) All responses are appreciated! Thanks

Does anyone know whether Core Data is the best in order for data to be Shared across multiple devices/users? I'm aware it needs to be in sync with CloudKit for this to be possible.

is it possible to fetch data from Firebase and format the view? I've been following a few YouTube videos and noticed all the data is put into the default 'List' view format so wondering if it's possible to code this to a more personalised view? Any links to tutorial examples would be appreciated!

I'm retrieving some data in my app that I have manually inputted into the Cloud firebase but have noticed that this will take me a very long time to add additional data once I start to scale as well as to maintain/edit/delete. Are there any alternatives/recommended data storage that I could use that would allow me to bulk load data (in a consistent format) to add/edit/delete? Any thoughts welcome!