I am having a lot of difficulty getting global 3 finger gestures to trigger and are seldom recognized in Live View, for me it is mostly the tap gestures, 3 Finger Tap, 3 Finger Double-Tap, Tip Tap Left & Right (2 Fingers Fixed) ETC. click and force Click gestures are mostly OK.
Adjusting the seeming applicable settings do not seem to improve the situation.
For the most part all other gestures trigger reliable and are recognized in Live View.