So I uploaded an iOS app build to App Store Connect and it says "Ready to test" on the main page. I set up an Internal Testing Group as well as an External Testing Group, but I am unable to assign the build to the External Testing Group as it doesn't show up as an option under "Builds (0) +" There is a message under Group Management that says "No builds have been approved for TestFlight beta testing yet", but I cannot figure out how to submit the build for TestFlight beta testing. Other searches I've done all refer to adding the build under "Builds (0) +" and the option to submit for beta testing review would show up there after doing that, but it doesn't because the build can't be added to the "Builds (0) +" selection. Any help would be appreciated in figuring out what I'm missing here.