How to display categories 3-4 levels in the top menu?

Question

css

Tell me how to display all under categories in the top menu?
There will be no more than 4 levels of categories.
Opencart 3.0.3.2 (Russian assembly)
I searched on the forums, but there is information from two years ago and older I
found one suitable module, but I don’t understand how to install
Here

example

Answer 1

You need to rewrite the menu.php controller since there are only 2 levels provided there.