We just sat down to start work on a video and found that Final Cut Pro and Motion do not work on macOS Catalina, yet. @Apple @MacRumors pic.twitter.com/Slyap4eV0I
— iTech News (@iKillTheApple) June 5, 2019
I use Xcode Beta, so there is no worry there and I also do not use Compressor and iMovie. This can be seen when looking at the App Store listings of these apps. I signed into a different Apple ID that had not purchased the apps before to show this. The price/get button on them are all greyed out and un-clickable. You can see this in this screenshot.