Sharing on website or Facebook

[Jeff_Hager]

Facebook has its own internal browser, which isn’t compatible with PWA apps. The link needs to be opened in Safari on IOS or Chrome on Android. Here is a prior thread that discusses this.

"Add to home screen button" not popping up

Same chrome version here. Interesting though, I’m have the same result with your app. No popup and the Add to Homescreen creates a web shortcut instead. Can you add a second tab to see if that makes it act differently? There must be something that’s not making it register as a PWA.