I can’t use two-finger gestures to zoom in/out or rotate the canvas

This may be due to the Scribble function in iOS.

Please try turning off Scribble and see if that solves the issues.

▼How to turn off the scribble

Launch the Settings app on your iPad > Select Apple Pencil > Turn off Scribble

Please refer to the video below for detailed instructions on how to fix the issue.