Tag your UTargetingPass with UCLASS(BlueprintType, DefaultToInstanced) and add Instanced to your m_TargetingPass UPROPERTY. That should enable you to see inner properties of UObjects. If you use only Instanced meta then only on that property UObject will be displayed, if you use both it will work as well. You can use DefaultToInstanced meta in class macro to make all occurrences of it as it uproperty was tagged with Instanced.