No, it is not effectively an embargo. The reason American economic punishments work is because they impose penalties on countries and companies that do trade with embargo/sanction targets, so even though it’s only America attacking these countries Chinese, European and other firms avoid trade due to the threat of secondary penalties. Tariffs only work on American soil, so they have none of these secondary effects and the result will be that China will simply sell their stuff to someone else. To repeat, American embargoes work because they also prevent the target from simply doing business with someone else.