The allies, just like Biden, have no interest in standing up to China. Tariffs definitely work, because if they’re high enough then companies will be forced to leave to setup shop elsewhere (such as Vietnam).

You can also see that China’s GDP growth (in 2019) was the lowest it’s been since 1990 (2020 will no doubt be much lower), and their reputation around the world is at an all-time low.

It’s also worth noting that the administration did a lot more to stand up to China besides tariffs (but tariffs that force companies to leave will of course hurt them the most).