Yup, and then Shanks 0.5 shotted completely fresh Kidd and Killer with a Divine Departure.
Xebec is not being pushed to extreme diff like Big Mom. No shot in hell, DR Xebec made AdCoC masters Roger and Garp pass out after the fight, Kidd and Law were having a casual convo after the Big Mom fight, they actually got up to potentially face Kaidou who was coming down. It's pathetic given how weakened they were before even engaging Big Mom without interference.
Idk what low yonkou lvl entails, but I know for a fact Kidd and Law are not capable of pushing Xebec to an extreme diff battle.