You can check your iOS app's submission status at any point through your iTunes Connect account. This is where your App Store listings are created, and where you can manage editable content.
Check out this article for info on what each status means. If your app status is Rejected, check out this article for info on how to proceed.
1. Log into your iTunes Connect account and click My Apps.
3. Find your app by scrolling or searching. Once located, you'll see the app status below the app name.
4. You can also click the app to view its status and listing details.
4. If your app is Ready for Sale, you can click More > View on App Store to view its live listing.