Chiming in.
USB connected to RC from Apple Mini 4
Open Go App 1st on Mini 4
Turn on RC controller. Mini 4 dings and lets you know the connection is established
Go app soft button changes form How to Connect to Camera. I enter the camera app.
Turn on P3. As soon as camera gimbal initializes, I get the live feed.
This used to take about a minute, but after a cold IMU calibration, it's nearly instant.
SD