No, it wasn't just fox, it was all the MSM that referred to her as the border czar and now they are blatantly lying saying that she was never called that and that Trump & Republicans made it up
if that wasn't her official title then fine, she was in charge of overseeing it, it doesn't change the fact that the open border is a disaster, millions are still crossing illegally and costing the tax paying millions.
https://thehill.com/opinion/immigration/4813704-kamala-harris-border-czar-denial/