Fix SwiftUI related issues

Need a SwiftUI expert to fix a bug with 1. Sign In With Apple for MacOS (Mac Catalyst) -- Sign in with Apple is working fine for iOS & implement 2. CloudKit Sync with core data: Core data is implemented, You just need to Sync CloudKit with core data for functioning on Multipe devices. For example if a user is signing in and adding data via iPhone, If he log in through Mac or iPad by using same Apple account then all the Core Data is synched and fetched to the newly logged in device. Please bid if you are good in SwiftUI & don't waste me and your time!!! Thanks