GNOME 40 brought a radical new interface with a horizontal first approach. One of the features in this approach is a three finger swipe for touchpad.
Swipe three fingers up on the touchpad and brings up the activity menu. Do it once more and you8217ll have the application menu. Move the fingers down and you8217ll be coming out of the application menu and the acitivity area.
Similarly moving three fingers horizontally moves you to the next workspace on your right or left.
I have installed Fedora 34 with GNOME 40 on my second laptop and experimenting with it in my free time. When I logged into the system after a few days I realized that three fingers swipe was not working anymore.
If you are facing the same issue here are a couple of methods to fix it.
In my case I had switched to the legacy Xorg display server instead of the default Wayland. I had to do this because no screen recorder would work with Wayland.