When tethering via USB with my Sony A7 RV, the Live View window does not offer the function to set the camera's focus point by touching the respective area with your finger.
For me, it's a deal breaker. So I have to stay with Lightroom on my Mac, where it is easy to set the focus point with my mouse. What a pity! Would have loved to switch to CO on my iPad!
Current workaround
There is none. I have to set the focus point within my camera or have its AI set the focus point automatically.