I don't believe this functionality is available for an iPhone that is connected to the Zoom meeting using the Zoom app made for iPhone.
If you used a laptop to connect to Zoom, and then connected the iPhone to the laptop, there are good options.
• Install FiLMiC Pro on the iPhone.
• Connect a Lighting to HDMI dongle to the iPhone
• Connect HDMI to a capture card that converts HDMI to USB.
• Set the Zoom camera to the name of the capture card.
Now, if you have another iPhone or iPad you can install FiLMiC Remote. This will allow you to remotely control the iPhone zoom inside of FiLMicC Pro.
If you're asking about remote controlling it from another remote location through Zoom, I may have wasted my time, since this is a solution for the iPhone and iPad being in the same location. 🙂
Jeff Widgren
#ZoomTestKitchen
Jeff Widgren
#ZoomTestKitchen