[kuboa]

It's optional and Apple didn't want to be listed. Their logo has never been displayed on the page. They collaborated with devs from Apple quite closely though, they used to put the meeting notes and updates on devtalk.blender.org

[bitigchi]

They still do. Latest[1] from just a week ago.

[1] https://devtalk.blender.org/t/2022-11-30-render-cycles-meeti...

[catach]

That did seem most likely to me, thanks for the confirmation.