Did you do Tools > Refresh VS Code project within Unreal after you added the projectile class? You need to do that whenever you add new files to the project.
Oh, I didn’t refresh the project, that cover most of it I would say. Thanks a lot.
Regarding the suggestions the extension might give, is the instructor using any particular extension you would recommend us?
For instance, now that I refreshed the project, this is the suggestion I receive: