On the way out the door, Pompeo has designated the Houthis, who control northern Yemen, a terrorist organization. Which means that any aid groups probably have to stop their work as they can be held liable, criminally and civilly, for aiding terrorists if they work with the Yemen gov't to distribute aid to keep war refugees and the impoverished population from starving and try to provide medical help.
Meanwhile the US keeps supporting the Saudi death machine with logistics and reconnaissance and in-air refueling. The more bombs the Saudis drop on impoverished Yemenis, the more bombs the Saudis will need to buy from the US. With pressure, the US likely could force an end to the Saudi war on Yemen. Enforce a peace process. 7 years of bombing the shit out of a poor country hasn't worked. Congress tried to stop US involvement in devastating Yemen and killing Yemenis, but Trump vetoed the resolution.
Biden should end the terrorist designation immediately, so that humanitarian groups can do their work. Otherwise hundreds of thousands will die. Life is that precarious for millions of displaced, malnourished and food insecure Yemenis. Roughly half the 30M Yemenis are at risk.
Biden needs to:
1) Remove the hideous terrorist designation from the Yemen gov't.
2) Stop supporting Saudi Arabia in its war on Yemen
3) Pressure the Saudis to stop warring against Yemen. The US has a lot of leverage over the Saudis, and they probably want to get on the good side of the Biden Admin, and Saudi Arabia might be looking for a way out of this endless war which is draining money and not terribly popular in SA.
I can provide some links, but my guess is nobody is overly interested in the Yemen War and Yemenis.