The hidden story is the depth of work required to replace a keyboard on a newer Lenovo. The amount of work is absurd. Easily an hour or two for the casual owner plus use of multiple tools. Don't blame the author for giving up on it.

https://www.ifixit.com/Guide/Lenovo+ThinkPad+X1+Carbon+6th+G...

"Step 26: Remove the seventy-two 0.5mm screws holding keyboard in place."