Always Show Nav Bar on Page

Dear FlutterFlow Community,

I have a quick question regarding the Flutter Default Nav Bar. I would like to have the Nav Bar on every page but without making each page a top-level-destination. Normally, I could achieve this using the »Always Show Nav Bar on Page« button except for the Flutter Default Nav Bar. Why is that the case, and how can I fix it?"

Thanks in advance 💙
Gabor