I’m loving the mobile web app that I got installed on my phone for the forum.
The forum itself. Just open the forum and add a it to your launcher if that word is the right one. Probably only works on Android.
So it’s sort of a shortcut to this website?
As the forum provides a manifest.json file it will act like an app on a mobile device.
It acts like any kind of responsive website should act on a mobile device. Not sure if that is what the OP is referring to.
True. But on top of that, it acts like a PWA. For example, the top system bar of the device can inherit theme colors, remove other elements of the browser, adds a Manjaro splash screen and make it look almost like a native app.