Hello,
no matter what I do. Navbar Toggle either doesn’t close and the links work or Toggle closes and the links don’t work. I have already installed a completely new Navbar and changed JS. Nothing helps.
I think you need to provide a link or way more details, what do you mean you “changed js”?
Oh right, that issue.
Hello,
do I everytime have to assign special attributes (for example: data-bs-toggle) to each menu-item of a menu (Bric or Bloc)?
No matter which navbar I use… Toggle doesn’t close automatically.
I’m really annoyed!!
Why? 
Bootstrap 5 does not support hover to open dropdowns out of the box because it’s designed primarily with mobile (touch) interfaces in mind.
You can achieve the same with adding some javascript.
Hello @Jerry, it’s not about opening dropdown via hover. It’s about automatically closing navbars on smaller breakpoints after click on a menu-item (for example “contact”).
Ok, got you. I have misunderstood that one completely. 
Maybe, it’s my “professionel” english. 