100 W USB-C cables are electronically marked using a chip, I believe chargers will not supply more than 60 W (which is the minimum every USB-C cable should be able to provide) unless they detect that the cable is rated for it. So it should be a binary yes or no for that part. Unfortunately this spec is often only listed on the cable packaging and not the cable itself, so there’s no way to know for sure just by looking at the cable as far as I am aware.