This.
I think the most likely reason to delay Israel is to get sufficient forces in the area to deter Iran and it's proxies from going all in....
I think it's prudent if that's the case.
On a side note...
China's President Xi Jinping and his Iranian counterpart, Ebrahim Raisi, called on Thursday for the lifting of sanctions on Iran as an integral part of a stalled international agreement on its nuclear programme.
www.reuters.com
Here's a WW3 scenario for you. What if China is instigating all the current events?
US drawing down it's munitions supplies supporting Ukraine/Israel. Get the US to commit forces to the ME. Get Iran to go "all in" and the US gets involved. US commits more naval/air assets...
Then go after Taiwan.
We'd be stretched pretty thin in that scenario.