Hi…,
Welcome
Please confirm you have installed Navigraph Navdata Center installed into default prompted folders.
This installs updated data into …your msfs\LocalCache\Packages\Community or Packages\Offical\OneStore\ if it is installed from the marketplace
For steam these folders are located at %AppData%\Roaming\Microsoft Flight Simulator\Packages\Community and %AppData%\Roaming\Microsoft Flight Simulator\Packages\Official\Steam
Cheers
Ian