Hello! I've been seeing the same issue: our UIGestureRecognizers are getting overridden by the iMessage Extension container's pan gestures.
I created a simple project to reproduce this (https://drive.google.com/drive/folders/1-IrHW2GkjKaMW5rdt29vZllbLNQR5wu0?usp=sharing). What setting did you use to ensure the recognizers take precedence over the sheet's resize gesture?
Quick screenshots for reference:
Your help is much appreciated!