Not very effective, there would need to be airdrops every 15 minutes to even tackle the catastrophe.
Cynically most probably ordered by the US and it's just being used to absolve the criticism as none the "it's the UN fault" lies worked. That's evidenced by the fact that It's Jordan and the UAE facilitating it who are very close allies with America.
A lot of Gazans are also at Stage 5 malnutrition which usually requires medical intervention to reintroduce food.