I have uploaded the Android App Bundle in Play console for Alpha testing but when I open the testing URL it is showing below dialog.
Steps to enable internal app sharing on Android devices:-
1) Open the play store app and click on the side menu option present
in the top left corner.
2) Click on Settings.
3) In about section, just continuously click the Play store version option for seven times.
4) Now, you will see the Internal App sharing option in the User controls section.