Android - Advice for big applications

I’m building an Android app that requires about 800MBs of external data. I put those assets in a separate Asset Pack, which in the .aab is declared as install-time.

How can I read the contents of that asset pack?

I already tried the apk unzip method, as suggested by this thread here, but I can only access the files inside the base APK and not the contents of the additional asset pack.

Any suggestions?

Thanks