It says “Not included in the Factory content”, and in theory, that wouldn´t be a problem.
In case you are in Windows, you can copy the Synthengine.vst3 to the Cubase 12 VST3 folder, and the plugins do appear and work. (You might need your Cubase 11 licence to be able to use it.)
Unfortunately, for LOOPMASH this doesn´t work, which is a NO GO for me. I´ll stick to V11.