Hi @ABC,
There are currently several different implementations of the header navigation. I’ll list the ones I’m aware of:
- the default in edx-platform (which in turn is used by any theme you use, ie. Indigo)
- The shared header navigation component used by many MFEs: GitHub - openedx/frontend-component-header
- Any MFE not using that shared header component described in #2
There are already a few different threads about varying facets of this, which I’ll share below:
- How to remove the Register page in Tutor Open edX
- Learner's dashboard MFE is not ready for usage in community
The long and short of it is that it is all a work in progress.