I did a PR to the React Native project to allow this feature. The PR can be check here: https://github.com/facebook/react-native/commit/ca7cbdee858e84c4a74a2d9c7be151f5cfdcfbfe
So, in the future, to run a release build from terminal you just only need to type the following command: npx react-native run-ios --configuration Release
If you want run your project on a real device use --device parameter:
npx react-native run-ios --configuration Release --device "Your Device Name"