I want to check how QA testing is done for iOS Mobile apps?

Option 1: Deploy the app to App Store in TestFlight mode and ask QA to test.

Benefits:

1. QA can test on real iPhone device.

Drawbacks:

1. Every time developer fixes the defect, he needs to do a new deployment to App Store with an incremented build number. So, it would lead to a lot of app deployments with many build numbers.
2. Would also take time to have the build available in App Store.

Option 2: QA has to setup XCode, build the app and test it on iPhone Simulator.

Benefits:

1. Can avoid App Store deployments with incremented build number.

Drawbacks:

1. It is not a real device testing.

Which approach is better, please suggest along with the process needed.