I love Lenovo X1 Carbons used and/or refurbs. But on one I could never get the two finger tap to bring up the right click context menu.
Yes, it drove me crazy.
The two finger tap settings existed in the Synaptic settings and I changed drivers a zillion times.
Then I found this hint . . . so i did it.
I rebooted and it didn't work
. . . and then I looked again.
Dang, there are 4 of them. So I changed them all and BINGO.
Sadly this did not work on my old Gateway laptop. It had only one entry so maybe if I changed drivers. The Synaptic driver hunt is cryptic at best.