We currently have the level 1 navigation: News, Products, Development, etc.
Then under Products we have the level 2: AXIOM Beta, AXIOM Remote, Open Cine at the moment.
This is done manually with blocks at the beginning of each subpage
When clicking on the AXIOM Beta we on the current website also have a level 3: with Overview, Tech Specs, Modularity, etc. (https://www.apertus.org/axiom-beta-tech-specs)
How could we implement this 3rd level navigation on Drupal8?
On the old apertus website we do it completely manually which isnt too great in a CMS sense :)