Thank you for your feedback!
Does pressing the menu button on the left controller open the Steam VR menu or the Quest Link overlay? In the native Meta Quest version, pressing the menu button on the controller opens the ingame menu (as it should be), but since I've been testing the PC version on Pico, which has problems with this button on Steam Link, I've added an alternative (Grip + X). I've not checked this on Quest on PC.
Sure, I have no reason not to put the menu on "X" for now, so I will change the mapping to something more intuitive in a future update.