I'm sure there is a simple solution, but... how do I activate touchpad tapping in LXQT.
Any help would be greatly appreciated.
I have an autorun.sh script with these commands (among other things) executed every time I log in.
You are looking for the TapButtonX=Y parameters. You can also modify some config file somewhere, but it might be somewhere between xinitrc or bash_profile, not sure. Take a look at the arch wiki, search "synaptics" touchpad or driver.