Sorry for the confusion. After further investigations, the channels with (*2) listed at the end of the fixture "Shehds LED Spot 100w Lighting (Standard 16CH) cannot be used as expected. In my previous comment, I only answered that the above fixture was already included in the fixture library, but actually only limited number of channels can be used as expected.
The channels with (*2) do not work as expected. This is the limitation of the current version of rekordbox lighting. The engineers are gradually adding new features in a new rekordbox versions in future. Actually, Gobo was added in rekordbox 6.6.0 so that you now can use CH9 and 10.
Sorry for not meeting your expectation and thank you for your kind patience and understanding.
Pioneer DJ Support