The transition takes time.
They do not even try to break away from Putin's Russia, if they do not reduce, but increase supplies in another form. Meanwhile, Putin's Russia receives money for the war from the EU and the US. Which speaks of the complete duplicity of all the "sanctions" (already in the form of "16 packages") and the real moral victory of Putin's Russia and China/India standing behind them. And since Russia has already effectively received 1/3 of Ukraine's territory by summer and legalized it at the international level through a "peace treaty", Trump is forcing Ukraine to do so and practically solves all the tasks set, it has in fact won a physical war against the West in 3 years, having a GDP more than 20 times smaller than the combined US + EU + Japan + Canada + South Korea + Australia. No matter what Western propaganda broadcasts in the future. And the West will eventually be forced to lift sanctions from it. This is what it means to have the largest nuclear arsenal in the world - you can dictate your will on the planet and the size of the economy does not matter - if the enemy is paralyzed by existential fear of survival.
The part you're missing is that those stack atop existing tariffs on Chinese imports. So, the total amount is higher than that. Still, not as high as previously threatened, but the trade deficit with China is so massive that anything higher would've been crippling to the US economy.
Tariffs should be returned by consumers, and by the poorest groups. This will lead to a reorientation of these consumers to American goods, not Chinese ones. On one key condition, I repeat - the quality of these goods must be obviously higher, with equal prices for American and Chinese options. After all, workers in the USA and Europe are obviously more qualified, aren't they, receiving much higher salaries? And if this is not so (there is no difference in qualifications, and therefore better quality of comparable goods), then duties are useless - as I wrote above, they will only contribute to corruption and the socialization of the US industry, which will have no incentive to become better - Uncle Sam will pay for all their failures in business at the expense of budget money, just as all the failures of the banking mafia have long been paid for by stupid money emission. So far, I do not see any hint from the US administration that they will begin to subsidize the purchase of goods by the American population at the expense of duties. And this should have been announced simultaneously with the introduction of duties. Even if the quality is the same (at the moment), and not higher, but the prices are the same (equalized), then it is logical that a US patriot will buy an American product, and not a Chinese one, right?
Let me give you a simple and understandable example: Let's say that a smartphone assembled in the US and China, identical in quality (capabilities), costs $500 and $400, respectively. Naturally, US residents will buy the one assembled in China for $400, given the same quality (and functionality). But the customs duty will raise the price of the one assembled in China to the same $500. There is no longer any point in buying a Chinese one. But the lower income groups suffer. After all, the price has increased by $100 for them anyway. This is when the subsidy for the authorities should kick in, and it should only work for such groups (the rich will get by - as Trump and officials said - let them endure the increased burden, although this directly contradicts Trump's election promises to reduce taxes for everyone, but who believes in election promises, especially in the "middle class" + - where there are mostly people with a good education?). As a result, the poor, like the rich, buy only goods assembled or made in the USA, because there is no difference in price for them, and the quality is the same. Again, if we assume that their intentions are pure and they are patriots of the USA, not China. The rich pay a conditional $500 for a smartphone, and the poor still pay $400, but ignore those assembled in China, which leaves the latter without an increased margin due to the frantic exploitation of a much cheaper labor force and various non-market mechanisms of pressure on other countries.