Embed Code for Post/Page

Hi there, I want to paste the clickable button (that is shown with your plugin at the bottom of the page) within a post/page where I introduce the feature and explain how it can be addded. I have taken a screenshot so you can better understand what I mean.

Can you pls. paste me here the code that I have to insert in my post/page in oder to get the “add to homescreen” function (with clickable button) also within the post/page.
https://i.postimg.cc/xCf5nP27/pwa-app.jpg

Thank you very much!