A group of some of the world's leading aid organisations on Thursday said US President Donald Trump's "Board of Peace" for Gaza is "failing", precisely because Israel is still obstructing the vast majority of aid into the enclave.

At a briefing for reporters at the United Nations in New York, Janti Soeripto, the CEO of Save the Children US, said her organisation, among several others, has reached out to the Board of Peace and offered meetings, expertise, and direct reporting from local staff on the ground.

Little to nothing has come of it.

"Six months on, children in Gaza are still not in school, malnourished, and not being treated for their wounds. The electricity grid and water infrastructure is 90 percent still unusable," she said.

"The [UN] resolution and the peace plan called for immediate full aid, no interference of aid, and the immediate rehabilitation of infrastructure. By all metrics, this has not happened."