Only one was shown in its entirety with a counter in the corner if there were more. ... In Android 14, long pressing on an icon just shows app shortcuts, as well as App info, Pause app, ...

The original app icon will still be there, but you can hide it from the home screen to avoid confusion. Just hold your finger on the screen until the icons start to shake and click the minus sign.

To do this, tap the Duo icon at the top right of the screen, scroll down to Super App Icon or Max App Icon, and tap Turn On..