If it can be useful to others, my Thinkpad X240 mentions vPro on the sticker at the low left corner as well.

Lenovo had at least one model in each generation's lineup with vPro support since at least the X200/T400 (so just over 10 years).

Rule of thumb (as far as I know, not exhaustive): No i3 model has vPro support, i5 models may or may not have vPro depending on the particular CPU used, and more or less all i7 models have vPro.