I'm discovering the iOS dev environment and I realized I shouldn't have used internal TestFlight. It requires giving beta testers a role in the project, which grants them some access to App Store Connect. My bad, I assumed it worked like Android.
Tomorrow I'll set it up properly with external testing, but I'm wondering: is it possible to validate testers one by one to avoid people who didn't get an invitation from joining? iOS devs, please help an Android dev :) Shares appreciated!