My Scenery is not showing even though it shows as installed in Content Manager

[IniSteve]

We sometimes see an issue with the MSFS cache not clearing itself after installing third party scenery. A good way to manually refresh the sim cache is by clearing your Scenery Indexes - 
 

To do that locate your folder by following the path below:
MSFS 2020

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MS Store: %LOCALAPPDATA%\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\SceneryIndexes
Steam: %APPDATA%\Microsoft Flight Simulator\SceneryIndexes

MSFS 2024

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MS Store: %LOCALAPPDATA%\Packages\Microsoft.Limitless_8wekyb3d8bbwe\LocalCache\SceneryIndexes
Steam: %APPDATA%\Microsoft Flight Simulator 2024\SceneryIndexes

Then delete the contents inside but leave the folder intact. The indexes will rebuild on next load of FS.

This should solve the issue.