Package name change in Google as new app on the same app

I can see there are answers to the question

if it is possible to change the package name in google console!

to be NO.

I also see people point out that the app with the new package name is considered as a new app. But what that means?

My questions:

Can I upload a new .aab to the same app in google console with a different package name or not?

Considering that it is OK for me if there will be two apps and the new one will be installed next to the old one if a user has already downloaded the old one and the new app won't update it. That is because my app is just released and there are not many users so I don't care. But I care about the package name in the app URL.

What happens to the URL with the old package name after I push my app to production?

Solution

Can I upload a new .aab to the same app in google console with a different package name or not?

No, you can't publish a update over the previous app with changes package name/app id.

But can change the appId of your app (present in build.gradle), and publish it as a new release, but it will allow new app installed next to previous one which you mentioned you don't care about.(That is because my app is just released and there are not many users so I don't care. But I care about the package name in the app URL.)

What happens to the URL with the old package name after I push my app to production?

If you mean url to play store , it will still navigate to old app if it exits on play store otherwise to a error page saying no app found or something similar