Recently, Matt Whiting posted:

I don't see how you get a 5 kph difference with 18m altitude
difference. The chart expresses the difference as a factor relative
to 1 as it can't give an absolute wind velocity difference without
knowing the base velocity at 1m which is where the chart starts.

[...]

The conditions in the original post is that the winds were 10 kts.
*reported by ATIS*. I don't know how one would translate that into wind
speed at the point of touchdown with any accuracy, but it's a safe bet
that the height of the wing doesn't much matter in this scenario. One can
be factually correct, yet irrelevant.

Neil