I noticed when I refreshed the page that the tab briefly appears and then flickered out. So, I tried to "catch" it like a little frisky Pokemon. Similarly, the page will work if you happen to have it bookmarked or in your browser history. Try appending recent/activity/ios/builds to the base url of your app: appstoreconnect.apple.com/apps/<your-app-id-here>/recent/activity/ios/builds?m=