So I can't get any video on my iPhone using the Ronin App and a Raveneye connected to my Nikon Z9. After reading a few threads I tried changing the HDMI output to other resolutions. No luck. Then I tried disconnecting the camera control cable from my Z9 to the RS3 Pro and now I get video if the HDMI output is set to 1080p.

Problem is I no longer get the advanced camera control functions since my Z9 is no longer connected by USB-C to my RS3 Pro.

This is very frustrating to have to choose between camera control via USB-C or video to my iPhone and being able to use Active Track. Am I missing a setting somewhere? Or is this a limitation of the devices used? It's annoying to spend this much money on high end products (and popular ones at that) and not have them work together.

Hello, there. Would you please check the setup method in the link below and tell us your feedback?
https://www.dji.com/support/compatibility/rs-3-pro/z9
3. The camera HDMI has no output and Ronin Image Transmitter does not transmit any image when the frame rate is set to 100 fps or above or the photo-capturing mode is elevated to slow motion.

I got it working. One of the DJI USB cables that came with my RS3 Pro was defective. Switching cables fixed the problem.