In the USA I’m pretty sure advertising scams - even the more ‘benign’ ones like claiming a product does something it doesn’t do or lying about its efficiency - are illegal. There’s just no - or not nearly enough - enforcement.
The situation’s been like this for a few years now.
If she had had more time, I could see Khan going after fake ads as well. There's nothing to me that suggests that she was deliberately ignoring fraudulent ads when she was extremely pro-consumer in nearly every other policy.
The cost of enforcement would break every government's budget. The cost asymmetry is the problem.
(US infocoms, and Google in particular, aren't reputable companies any more. Ban them all.)