Taiwan is also the center of a lot of specialist equipment (not the big swiss-watch ASML machines, but stuff like wafer transports, cleanroom gear, etc.) and consumables (chemicals, bunny suits, etc.). I don't know how extensive and fragile that ecosystem is but I live in eastern Michigan and it seems like every small to midsize town has some tiny automotive supplier that is somehow still in business even while the big plants have moved on. I suspect this is largely because they have no competitors and it is specialist work that doesn't really scale (meaning there is only so much of this work to go around, even if global auto sales 10x) so no one is really motivated to compete either. The result is that the GM and Ford plants leave the country, but still rely on a relatively small set of expertise and tooling that only exist in the rust belt. Presumably, a thorough nuking of the Midwest would (in addition to lots of other unpleasant effects, like the death and famine millions, perhaps billions) at least require the pause of the majority of auto manufacturing around the globe. Assuming people still wanted cars after such an event, it could be recovered, but it would take time.
I got a little carried away with the Michigan analogy, but IMO it doesn't go far enough: Taiwan is far more integral to the global semiconductor industry than Detroit is to the global auto industry.