According to wikipedia you're right and wrong... Gaza Health Ministry operates as part of the Hamas Government. 🤷♂️
I take all of these figures with a grain of salt when they're reported by one of the belligerents. In this case ABC report that UNICEF and WHO express concern over the "reported attack", ie not condemnation of something they have first hand information on.
I really don't know where to get accurate news from these days.