Thanks for your reply.
Not supported, and not redistributable anyway. If it was, we would already be providing it for people to download.
Yes, I am aware that Kitware is not providing this. In previous ParaView versions (<= 5.6) we used to distribute ParaView SDK (ParaView superbuild with -Dparaviewsdk=ON) for Ubuntu (16.04, 18.04) and CentOS (7) users by building them respectively in Ubuntu (16.04, 18.04) and CentOS (7) Docker containers. We need the SDK specifically because the library that we develop uses a ParaView in-situ C++ pipeline to generate visualization output.
Do you know the reason for why the flag paraviewsdk breaks the redistribution? AFAIK, the flag copies the headers and CMake files for other software to build against ParaView.
I guess for now we will have to continue distributing distro-specific SDKs.