None of the Set functions in the UWindDirectionalSourceComponent are able to be called from code. The functions can be called from Blueprint, but without the ENGINE_API macro, none of the functions are exposed to be called from code.
No. It was not possible to add a UWindDirectionalSourceComponent to a code class in 4.19.
The build fails with a LNK2019 error.
The build completes successfully.
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-64803 in the post.