There is a 0% chance Taiwan will embargo the US unless China conquers it first.

Nice try FSB ಠ_ರೃ

I presume you mean china rather than Taiwan, but the short answer is that sanctions are only as good as leverage and the popularity of the people imposing them. Getting sanctioned by the US is a big problem, because so many other countries will cut you off rather than jeopardize their own trade relations. Getting sanctioned by China or Taiwan would be a genuine problem, but neither country has so much leverage that they could get everyone else to go along.

The US is at a historical nadir of popularity, perhaps for structural reasons. But even if it were wholly isolated, its internal resources and expertise are more than sufficient to operate as an autarky.