Why oh why do people believe that Swedish companies are allowed to sell dangerous products to American citizens without having to answer to laws in the US. That is very funny.
Any import of dangerous products into the US are stopped by customs at point of entry into the country, not by restricting what can be brought on the internet.
There is no US law saying what electrical products can be sold on the Internet by countries outside the US.
The only control on purchases from foreign countries are the import restrictions enforced by customs. These hopefully include restrictions against importing dangerous items.