Whilst visiting Japan, Biden was asked by a reporter if the US would defend Taiwan militarily if China invaded, when it has not done so in the invasion of Ukraine

Biden: Yes... that's the commitment we made.

That's a good move. There's nothing to be gained from the old policy of deliberate ambiguity - unless your plan is to do nothing - in which case 'bluff' is all you have.

The best cure for war in Taiwan is prevention. There's a lot at stake for China if an invasion of Taiwan fails, so let them know in advance that if you do A, then B is gonna happen.

The CCP are smart enough to take that onboard - it may act as a deterrent. If it doesn't, you haven't lost anything strategically.