bundleRelease does not generate aab File

I’ m working on this cocos2dx game project, that uses gradlew 6.8 for building for Android in linux.

I can build apks for release or debug without problems using ./gradlew assembleRelease or ./gradlew assebleDebug

But now, I have to build an app bundle in order to upload on google play store.

I tried ./gradlew bundleRelease and it seems the build was ok since I did not get any error message, but a Build Sccessfull message.

Despite that, I was not able to find the aab file that should be generated. I look for the /app/build/outputs/ and there is only the apk folder, not the bundle folder.

Any Ideas ?

Thanks in advance people.