It’s normal that there’s only VisionOS in that folder.
UnrealBuildTool is located in Program Files\Epic Games\UE_5.5\Engine\Binaries\DotNET\UnrealBuildTool.
Make sure that directory is added to your Windows PATH environment variable.
Also, ensure that the “.NET desktop development” workload is installed in your Visual Studio setup.
Next, MAKE A BACKUP OF YOUR PROJECT FOLDER (JUST IN CASE), and delete the following folders from your project:
- Binaries
- DerivedDataCache
- Intermediate
- Saved
Finally, restart your computer and try again.