MSBuild project cannot find headers from package installed via vcpkg.

[Karma5s]

I'm trying to integrate vcpkg into my msbuild project. Currently using manifest mode however when I build the solution in Visual Studios, Visual Studio cannot find the headers for the package that I installed via vcpkg (opencv) I've also tried to hardcode the paths into the Project's properties however it just says cannot open source file <opencv2/opencv.hpp>. I've tried to use vcpkg in a brand new project and opencv works out of the box without manually adding the include paths. What am I missing here?

  "$schema": "https://raw.githubusercontent.com/microsoft/vcpkg-tool/main/docs/vcpkg.schema.json",

  "dependencies": [
    {
      "name": "opencv",
      "features": [
        "world"
      ]
    }
  ],
  "overrides": [
    {
      "name": "opencv",
      "version": "4.9.0"
    }
  ]
}