Add a PWA icon to home screen

Today spent a lot of time to add the PWA icon to the home screen on iPad (tested on iOS 12.1.1). For my application, for some reason, the standard PWA prompt was not showed, and i am find how to do it manually:

And we see the icon on home screen:

Dmitry Schegolihin writes about his front-end experience for platforms Magento2, Vue Storefront and performance optimizations. I help businesses earn more by developing and optimizing web apps.