Who are these UL Solutions? They seem to have come out of nowhere and hit the jackpot, inserting themselves as arbiters for security. Smells a bit like how Common Criteria proffered independent certification labs, which were no panacea either.
I just looked at the closest mains powered device I have here (a fancy humidifier/fan), and only saw an Inmetro mark, there's no UL mark at all.
(My point is: plenty of people are not from the USA. I happen to have already heard that the UL is sort of the USA equivalent of our Inmetro, though like many things in the USA it's a private entity instead of a government entity, but the parent poster probably hadn't heard of that.)
I am not sure I understand why UL are "well suited" to provide these services. Is it that they have a compatible business model? I do not see how 130 years of solid experience in one domain means (much of) anything for an entirely different domain. Sounds like they have a nice round 0 years of experience in security. To make a crude analogy, this is like telling CERN to go start building spaceships. I mean, CERN has a proven track record for building complex things, right?