Is it possible to display the icon in the smartphone activity if the application was created from a website?

Maybe the question is not clear.
For example I created an application from the website here appsgeyser.com or Android studio
Installed it on a smartphone. The icon appears
Is there a way to display the icon activity such as chat. If I received a message, the icon number one. By analogy, vk, viber, and so on.
April 3rd 20 at 18:38
1 answer
April 3rd 20 at 18:40
The application site is a Progressive Web App (PWA).
There is documentation for Android.

Specifically to your question Google on demand: pwa, icon badge.
As a response to this article.
Yes. but I can not understand whether it is possible to display the icon numbers, for example when you write in a personal message - Kenny_Bra commented on April 3rd 20 at 18:43

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