Miller has had a long spout He usually says nothing when asked about Gaza This time he indicate the US has appled pressure, maybe more changes to weapon supplies. Also pointed out the obvious - an attack on Rafar will totally screw up aid deliveries. So far they are not happy with any of the truck numbers that have been achieved and have always asked for more, As the figure of 500 has been achieved in the past this puts this aspect into perspective.
The illegal use of US weapons aspect. They have repeated asked Israel to reduce civilian deaths and are not happy about the results. Still too many. They have their dept that looks into illegal use etc. Reports say Israel is the only country where the results from these have to be passed by Blinken. From some one who claimed to have been involved in this area.
Gaza and West Bank and the ICC, Not within the ICC's jurisdiction. Bit odd really as a number of things Israel do are clearly outside of what an occupying country can do to the occupied. Interesting to consider weapons supply considering this. US just veto anything that comes up via the UN security council and disregard UN comments which are always law based. Loads of them.