React Native + Metro: Build Android / iOS with custom scripts

Premises

To allow for multi environment builds, the following Android flavors were set:

productFlavors {
  development {
    resValue "string", "app_name", "AppName Dev"
    applicationId "com.org.nativeapp.development"
  }
  staging {
    resValue "string", "app_name", "AppName Stag"
    applicationId "com.org.nativeapp.staging"
  }
  production {
    resValue "string", "app_name", "AppName"
  }
}

On package.json, we could then build the app over different environments through the following scripts:

"android": "react-native run-android --mode=developmentDebug --appIdSuffix=development",
"android:prod": "react-native run-android --mode=productionDebug",
"android:stag": "react-native run-android --mode=stagingDebug --appIdSuffix=staging",

Introduction to the Problem

After upgrading a React Native project from 0.67.5 to latest (currently 0.71.3), when running metro through npx react-native start, we now have the possibility to build Android and iOS by simply pressing a key, as shown below:

Problem

Now, being able to directly build from the Metro process is very handy. But because those commands are (presumably) only running react-native run-android and react-native run-ios, those builds fail as, because of the multi environments setup, it'd need to run react-native run-android --mode=developmentDebug --appIdSuffix=development instead.

Conclusion

1. Is there a way to modify the scripts that are run when building through the Metro session? If not,
2. Is there a way to simply attach flags to those default commands, so to be able to build a specific Android flavor while on Metro?

Extra: Out of curiosity, on top of the default commands on the Metro session (r - reload the app, d - open developer menu, i - run on iOS, a - run on Android), would it be possible to add some other custom script?

Any comment on this is deeply appreciated - Thanks a ton in advance!

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