title: How to update screenshots of an existing app on appstore?
body: <p>I've distributed/uploaded the IPA via XCode to appstoreconnect.apple.com and I can see that my latest version is under "processing". Since this is not a "new/fresh" app on appstoreconnect, it seems like it's not required to have a new screenshots and the app submission is instantly under processing status?</p>
  
  <p>If I wish to update the screenshots, wondering if there is such option for me? Or is the option yet to be available due to the reason where it's still under "processing" status? And may I know usually how long is it gonna be under "processing" status?</p>