Was a *little* off in my dates:
Secretary of State Antony Blinken says the "One China Policy" hasn't changed and that the U.S. remains committed to it, which he says is guided by the Taiwan Relations Act. However he says that what has changed is Beijing's "growing coercion," including trying to cut of Taiwan's relations with...
www.c-span.org
A State Department official reiterated the U.S.'s "rock-solid" support for Taiwan and urged China to cease "military, diplomatic, and economic pressure."
www.newsweek.com
Regarding the US CBGs sailing through the Taiwan Strait; simple; Freedom of Navigation. Would be no different if the Russian Navy sailed through the English Channel or the Straits of Bosporous.
The US has long sold weapons to Taiwan per the obligations under the Taiwan Relations Act regardless of the One China policy.