USB-IF does enforcement... for USB-IF certified cables.
Personally Im super glad there are a world of much cheaper more affordable cables that work quite adequately.
I do wish we could as a society defend ourselves better but certification is an expensive & absurd trust mechanism. If certification were a lower cost, faster process I'd respect it as a social safeguard, but certification isnt easy. For one, it's not one off... USB-IF has to go shopping from time to time in the wild to make sure the goods are still good. It's expensive, but for a reason.
Ultimately relying on centralized trust actors, and using aggressive legalist pursuit to enforce compliance, is 100% against the spirit Im looking for. It has some upsides, but that's obvious legalistic authoritarianism, is the lawful-evil square on the D&D alignment chart. It's what I think the EU is trying to get away from!
So let's talk alternatives!
Personally it frustrates angers & saddens me that our systems are blanketly unobservable. USB-HID spec has really good telemetry for chargers to self-report their output voltage & current (a monitoring task many already perform). Devices ought be able to detect input voltage fairly well (and again many implicitly do, they again just dont report).
Being able to see graphs of output/charger power versus input power seems like a dead simple ask, and the difference between those two is loss. Being able to make whats happening easy to see would let us all help self-police, would let us become smart informed consumers, who know how to gauge the quality of what we have & share that good information out.
It should just be a standard feature in computing that objects extrospect, report; computers rhat are black boxes lack the fundamental "soft"-ness that is computings best & highest angel.