After setting up i3 on my new laptop, the tab to click of my touchpad did not work.
Fortunately Cody Craven had the solution:
When switching from Gnome or KDE to using i3 tiling window manager on a laptop, you might be frustrated to discover that tap-to-click on your touchpad no longer functions. This is how to re-enable tap-to-click in i3 by properly using X11 configuration.
https://cravencode.com/post/essentials/enable-tap-to-click-in-i3wm/