So much for not going off topic.
Yes. On a purely defensive capacity. The US 7th Fleet has been patrolling the Formosa Strait for the past 7 decades. This includes a couple of nuclear vessels, including submarines.
Taiwan will put up a hell of a fight on its own, even without US intervention. They won't win, but they will inflict significant damage. But that's not the main reason China won't invade/ Everything China wants in Taiwan are scheduled for self destruction in the event of a successful invasion. This includes all semi-conductor plants, as well as any useful military installations. All usable assets, especially cash, would be transferred out. This is public information. Meaning the only thing China gains after a costly invasion is an island of resentful people, as well as years of financial and economic sanctions, ala Russia. Their economy is already weak, and any invasion will be enough to collapse it.