It’s understandable if you’re coming from previous flightsim with the FMS Data system. They don’t work with MSFS, so it’s easy to think that it just doesn’t work.
But the forum has a category dedicated to MSFS and the instructions to download the separate installer and update the navdata.
I have the benefit of not knowing about navigraph at all before getting MSFS. So for me, it’s a blank slate and I get to learn everything about it. That’s how I found about this, and get it working.