While true, it looks like bauxite is mostly mined from Australia, with a long tail of other countries, many of which are within the US sphere of influence or far from China.
The biggest exception seems to be Vietnam, with a very large reserve of bauxite (and obviously quite geographically close to China).
Vietnam has faught war with china more reciently than the us. They are also afraid that chian will attack again, while they are reasonable confident the us won't.
Economic interdependency helps keep the relative cold war peace amongst frenemies, while tariffs and trade wars are likely to increase the risks of proxy wars and direct military conflict.
I think this hypothetical is more about once a conflict is imminent.
Also, general consensus seems to be that economic codependence has failed, with Russia invading Ukraine, humans rights abuses and authoritarianism in China, and China poised to attack Taiwan.
https://en.wikipedia.org/wiki/List_of_countries_by_aluminium...