Garuda i3 has disabled tap-to-click by default. Follow these steps to enable tap-to-click in Garuda i3 or any other desktop environment or window manager.
Follow these steps carefully, it requires root privileges.
Option "Tapping" "on"
Option "TappingButtonMap" "lmr"
4. paste this text into 30-touchpad.conf (file opened in step 1)
5. save the file (Ctrl + s)
6. quit the editor (Ctrl + q)
If you follow these steps carefully, tap-to-click should be enabled.
Tip: Visit https://wiki.archlinux.org/index.php/Libinput for more configuration of touchpad