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1. • When building the App, set the Runner to be any iOS device.
   • Make sure to update the Build  number to be the proper version when submitting
   • During Re-sign Runner  step when distributing App, if you encounter Missing private key  error in the below screenshot, refer to Distribution certificate / private key not installed - Stack Overflow. 
   • 
2.  
   • During Archive, if flutter.h not found, 
     1. Remove ios/Flutter/Flutter.podspec: rm ios/Flutter/Flutter.podspec
     2. flutter clean
     3. flutter run

Now Archive again, the problem should be fixed.

Once the app has been uploaded, go to App Store Connect and log in, you can find the new build (may take a while after uploading from Xcode) as in the screenshot. 

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