In documentation for Firebase App Indexing they say that App will be displayed also for users that don't have this app installed.
New users see an install card for your app in Search results when relevant queries trigger.
or from here
The install button for your app appears next to your homepage search result, giving users an easy path to installing your app to view content.
I tried to see examples from DailyMail, Buzzfeed, Etsy but couldn't. I don't see app install card, or even Instant App link in search results for relevant queries, when I don't have any off these apps.
when app not installed: I don't get any install app button, beside results
after app installed I can see App icon
