Well I don’t know what to say then. In Nuendo my meter goes to a maximum of 0dBFS (actually it may have +3 for True Peak overs). It sounds as if either there’s a preference set differently, or the version you’re running is different, or the plugin has an offset that makes 0=0.
I’m assuming btw that the VU plugin has a maximum level of +18VU, and has a red area that goes to +3VU like most of them do.