Got my letter, too, for my 2019 GSW. Seems like this should be a recall instead of an "extended warranty" to replace a cheap failure-prone part that can leave the car unusable, or worse yet, with gas pouring out of it. But anyway.
Has the part been redesigned, or are the failures purported to be from a manufacturing defect?
Is there a way to temporarily work around the failure when it prevents filling the tank, or is the only recourse to replace the part? It's cheap enough that I'd consider preemptive replacement, though spelunking in the gas tank isn't fun.