I think they've been very consistent and deliberate on their messaging. They don't want people in the state department to give official statement about de-escalation, but Biden and Blinken are still making those statements themselves, and they're reportedly pressuring Israel privately too.
It makes sense. I don't think there's a more fraught topic than this. You want to control your messaging around de-escalation to word it correctly, and it's best for Biden and Blinken to handle that directly.
Geopolitically, it has to remain clear that the US will keep its word and help Israel. And I think even the sharpest US critic would agree the US presence is a powerful deterrent against Iran and company pulling shit -- and if they do, the US will need to react quickly. Iran is behind all this shit, no one should take issue with telling them to shut it.