Where to find app url link in App Store Connect for beta app in the year 2019?
After updating new design of iTunes connect, apple has removed "View on App Store" button option to see your app link.
It's only display when your app is Approved by apple (first time). after it will always visible for that app.
Another option for us until apple will enable that option:
https://apps.apple.com/app/id{{appId}}
Reference: https://help.swiftic.com/hc/en-us/articles/201574352-Add-Your-App-s-Apple-App-Store-URL-to-your-Landing-Page