Wasn't really aimed at either. But maybe to answer the question: if Huawei acts as a middleman that buys embargoed goods from the US and then sells them to a country under embargo then under US laws both Huawei and whoever sells to Huawei can be held responsible (individuals and the company as a whole), the place the actions take place aren't relevant as far as I know. Even companies selling their own product to embargoed countries without any US involvement face economic sanctions under US laws (though their executives presumably would not be arrested.)

If HP (A US company) sells to a middleman without knowing who the final customer is for embargoed goods then HP and its executives can be held legally responsible.

This is mostly based on mandatory training I had to go through while working for a US company. I am not a lawyer ;)

If embargoes were trivial to get around they'd be pointless. The intent of embargo laws are to as much as possible, within the full power of the US, prevent goods from getting to a certain country regardless of any other variable. Embargoes are pretty extreme actions, there are only a few targets for those in general and the embargo usually targets specific goods.