Here is a list of all enums with links to the classes they belong to:

ARUpdateTarget : OpenCVForUnity.UnityIntegration.Helper.AR.ARHelper
Calib3dSolvePnPFlagsMode : OpenCVForUnity.UnityIntegration.Helper.AR.ARGameObject
CopyMode : OpenCVForUnity.UnityIntegration.OpenCVMatUtils
DumpMode : OpenCVForUnity.UnityIntegration.DebugMat
KeyPoint : OpenCVForUnity.UnityIntegration.Worker.DnnModule.MediaPipe.MediaPipeHandLandmarker, OpenCVForUnity.UnityIntegration.Worker.DnnModule.MediaPipe.MediaPipePoseLandmarker
LayoutType : OpenCVForUnity.UnityIntegration.DebugMat
MediaPipeFaceRunningMode : OpenCVForUnity.UnityIntegration.Worker.DnnModule.MediaPipe.MediaPipeFaceLandmarker
MediaPipeHandRunningMode : OpenCVForUnity.UnityIntegration.Worker.DnnModule.MediaPipe.MediaPipeHandLandmarker
MediaPipeHolisticRunningMode : OpenCVForUnity.UnityIntegration.Worker.DnnModule.MediaPipe.MediaPipeHolisticLandmarker
MediaPipePoseRunningMode : OpenCVForUnity.UnityIntegration.Worker.DnnModule.MediaPipe.MediaPipePoseLandmarker
MultiSource2MatHelperClassInterfaces : OpenCVForUnity.UnityIntegration.Helper.Source2Mat.MultiSource2MatHelper
MultiSource2MatHelperClassName : OpenCVForUnity.UnityIntegration.Helper.Source2Mat.MultiSource2MatHelper
NMSStrategy : OpenCVForUnity.UnityIntegration.Worker.DnnModule.DAMOYOLOObjectDetector, OpenCVForUnity.UnityIntegration.Worker.DnnModule.NanoDetPlusObjectDetector, OpenCVForUnity.UnityIntegration.Worker.DnnModule.YOLOXObjectDetector
ProcessingCompletionKind : OpenCVForUnity.UnityIntegration.Worker.ProcessingWorkerBase
SolvePnPRefinementMethod : OpenCVForUnity.UnityIntegration.Helper.AR.ARGameObject