Refer to this answer. You simply can't do that, unless you want to do it in specific development/test machines where you can set the below chrome flag,
chrome://flags/#bypass-app-banner-engagement-checks
You can't expect all your end users to set this flag, so this can't be a solution for all the real users.
I also don't see why you would have to show the banner even after adding to home screen, for any other use case. Browsers don't allow this for obvious reasons. It will be annoying the user, if the prompting is left to developers. Linked answer have more clarification on the same.