It's very questionable if America will play a role there. It's 50/50 that Xi will be able to do a personal favour to Trump or Musk that will keep America out of it.

When the times comes to defend Taiwan (or Japan/Korea) it will be life or death for the US to react and win. If they fail, the whole house of cards will collapse for the US. Trump as stupid as he is had gotten the ball rolling in the correct direction in his first term and I don't see how he will deviate this term.