I'm not sure if it's the feed page or the launcher itself, but things with this launcher don't seem to respond well to Android's Gesture Controls. I've uploaded a video recorded on my Pixel 4XL to show this, but the general problems I see:
if I swipe from edge of screen on home screen, it works as normal (does not invoke back button like in an app). However, if I swipe from edge of screen on 'glance' page, it acts as an app and brings up the back arrow rather than smoothly moving to the 'main' home screen'
In addition, using the 'swipe navigation bar to multitask' is completely broken when using this launcher, regardless of if doing it from the launcher or from an app. If I swipe the bottom to change to a recent app, I am stuck in the 'card' view, completely unable to interact with the app that seems to be open because it never actually opens and I am in the carousal. I have to swipe up slightly to initiate the full multitask view, and then return to home or select an app from there.
I have also created an android system bug report if that would be helpful. running 6.2.200603.79130 installed from Play Store Microsoft Launcher Preview.