I just upgraded apex from 20.2 to 21.2 and one of the new features is the PWA option (install app icon on the navigation bar.
I updated the app theme and set compatibility to 21.2.
I tried to manually add the link but when I run it I always get the error below, thanks
Your device or browser does not appear to support the installation of Progressive Web Apps right now.
If this application is already installed on your device, open it from your home screen.