Nothing basically.
Israel has shifted to a doctrine of decisive victory:
There have been questions over the practice known as “mowing the grass,” a strategy of attrition that involves repeated conflicts with enemy forces to restore temporary deterrence. In 2020, Lt. Gen. Aviv Kohavi, then Israel’s chief of staff, turned instead to a strategy he called “decisive victory.”
Last week, the current chief of staff, Lt. Gen. Herzi Halevi, told troops operating in the north that they should prepare for a ground maneuver in southern Lebanon, where they would “decisively destroy” the enemy there.
The US keeps talking about de-escalation, but what they mean by that is for Hezbollah to roll over and die or surrender. The (only) escalation that the US wants to prevent is from Iran and its allies.
The Secretary expressed full support for Israel's right to defend itself and its people against Iranian backed terrorist groups. Secretary Austin stressed that the United States is determined to prevent Iran and Iranian-backed partners and proxies from exploiting the situation or expanding the conflict.
Whenever the IDF kills someone in Hezbollah, the US says justice was served.
So the UN works as [intended]: it prevents the interests of the P5 from being affected by the rest. (Speaking of which: literally tearing up the UN charter has been popular over the ages.)