Update iOS App Store What’s New while in review?

Question

Simple question – can we update the “What’s New” text for an update while the app is being reviewed, or after it has been approved but before releasing it?

Answer 1

As of April 2018, it's no longer possible to change the "What's new" text after the app version changes its status to In Review, Pending Developer Release or Ready for Sale. You have to upload a new build and go through App Review again to change the text.

Nevertheless you can change "What's new" text before that, even while it's waiting for review.

Source: 9to5Mac

Answer 2

So, it turns out you can edit it whenever you like, even after the app has gone live, apparently. We apparently had a release with a typo in the update notes a while back and could pop in and fix it after a user tweeted about it.