When looking at your navbar I'm reminded of a horizontal scrolling navbar.
I can't really find the article it is referenced in, but it was an article about alternatives to an off-canvas/drawer/hamburger menu.
The article mentioned a big American news outlet using the navigation on their site, but I don't remember which site is was.
They put the most important links at the front and the least important at the back.
It might result in a very long, scrollable bar.
Personally, I think a better solution might be a mega dropdown.
This example is responsive and can hold a lot of links over multiple levels.
I also would like to comment on the sheer number of links on the same level. I recommend reducing the number of categories per level. You might have to create more levels, but it will help with discoverability. I base this on Hick's law, Miller's law and the Jam Study.