Can beta-features be added to the app on the App Store?
No Demos, Betas, or Trial Versions

From the App Store Review Guidelines …


  2.2 Beta Testing
  
  Demos, betas, and trial versions of your app don’t belong on the App Store – use TestFlight instead. 


Still unsure? Only Apple can answer this question authoritatively. Please contact Apple iTunes Connect team directly and ask.