No actual specific charges except the following: “The state department found that Israel did not fully co-operate with US efforts to “maximise” humanitarian aid into Gaza in the initial months of the conflict.”
Which is an outright lie. Israel has been sending in more aid than the UN and UNWRA working with/for Hamas has been stealing it and squirreling it away from the population. This is well known and covered up by the UN liars and Israel haters.