Make sure you're using Safari browser on your iPhone or iPad. The PWA installation only works in Safari.
Look for the share button (square with arrow pointing up) in Safari's toolbar at the bottom of the screen.
Scroll down in the share menu and tap "Add to Home Screen" option.
You can customize the name if you want, then tap "Add" to install the app on your home screen.
Tap the Booyahh icon on your home screen to launch the dashboard. It will open in full-screen mode without Safari's interface.