People underestimate how much production other countries are capable of. Of course, China does dominate the manufacturing game, especially mass production.

There's no shortage of alternatives all the same. Vietnam in particular has been doing quite well taking manufacturing work that companies are moving out of China so as to diversify their production chain. India is rising on that front too. Not to mention that the west truly does far more manufacturing than people give credit for — I've found that nearly every category of general goods that I try to buy will have some US made options. That's not even touching the rest of the west. The big exception being electronics, but those have Vietnam and India as growing alternatives, with Taiwan, Japan, Malaysia, and Singapore all as solid players in that market.

The overall point being: it's entirely possible to remove China from the manufacturing chain if there's enough money behind the push. The US economy is probably large enough to do so with some meaningful struggle. The US and major allies could do so more easily. The difficulty is more political and temporal. Getting everyone on board and committed plus going through with the multi-year long process.