I think I wasn’t clear enough on how I have done that. I placed a regular full screen bloc with content as a first bloc. Then, I placed hero with sticky nav enabled under it (you can put it anywhere, even in footer).
The effect looks identical to me. Maybe I am missing something.
BTW, the hero bloc I place below will not have a navigation visible. All you need to do is to make it shorter using classes, and it will serve as a regular bloc.
Here’s the video: https://blocstemplates.com/demo/menu.mp4
EDIT. By the way, the transparency on Wedding template is by design. You can make it just solid white.