Presumably a wait-and-see approach? No one buying an Apple Vision Pro doesn't already use these apps, so it's not like they're missing out on a huge new user base.
You don’t usually announce a wait-and-see approach. You just wait.
This feels like a calculated, possibly coordinated attack.
Companies declining to do free work for the benefit of another company's platform is not a "coordinated attack".
Companies announcing that they’re not going to do work, and actively doing work to hamper said platform (e.g. Netflix disabling the iPad app from working on the VisionPro) sure comes across that way.