How to obfuscate index.android.bundle in apk build with EAS and managed workflow?

Please provide the following:

  1. SDK Version: 45
  2. Platforms(Android/iOS/web/all):android

Hey guys, i got penetration test in my company and i see that the build generated index.android.bundle file when itry to change .apk to .zip, so in that index.android.bundle some of javascript code is not obfuscated, how can i make it obfuscate? cuz i have a string say key = abc. and this key is not obfuscated