User Profile

As the Product Manager, I want to have more control over the testing our company does before releasing an app update. Currently, I'm able to set up only one group of testors in TestFlight. But I want to be able to do a more controlled release, with more rounds of testing. Something like this: testing by only me testing by key stakeholders internal to our company testing by interested parties of our parent company testing by power users publish to app store Is there any way I can do this, given Apple's tools and constraints for app testing?