I think the new navbar information is now here: /core/app/core/src/lib/components/navbar or here:core/backend/Navbar
I’m pretty sure the first one is the most relevant since its not in the folder backend and on Adding a Custom Sidebar Widget :: SuiteCRM Documentation they say:
"The first step is to create a standard component. You can place it anywhere, though we recommend following a folder structure similar to the core one. So you could add it to
There might be a a way to use the /core/app/core/src/lib/components/navbar/grouped-menu-item and the information in /custom/include/tabConfig.php to make an extension or something in the custom or extension folder to match the old menu layout you had, but I don’t know if that is possible.
You might have to wait for the Module Menu Filters integrated to the new front-end in a later update. One of the members of the Forum Team or Maintainer can probably help more after the holidays.
I’ll see if I can figure anything else out, but I don’t know if I’ll get any further.