Package Name Extention (com.example.xyz)

[ShanmugaNathan2023]

Read below post

Package Name issues again

you can use Un-Official Offline version of MIT AI2 which has Package Name feature in project properties section, Just Import the AIA file and set package name and build the APK or AAB.

But keep in mind that it's not maintained by MIT team,
if you use that you should ask any questions related to that in that community. You as a beginner it will be the simplest way to do so