Here you will find an interesting analysis of appointments by POTUS that require Senate confirmation. I will summarize:
Some 268 posts have not even started the confirmation process. 261 have no nominee.
POTUS, a.k.a. Donald Trump, has an explanation which you can find here.
I will content myself with a single quote, emphasis mine:
President Trump says: “I’m the only one that matters” in setting U.S. foreign policy, thus downplaying the importance of high-level jobs such as the assistant secretary of state, which is currently vacant.
“Let me tell you, the one that matters is me,” Trump said in an interview that aired on Fox News on Thursday night. “I’m the only one that matters, because when it comes to it, that’s what the policy is going to be. You’ve seen that, you’ve seen it strongly.”
The president was responding to a question from Fox’s Laura Ingraham, who asked him, “Are you worried that the State Department doesn’t have enough Donald Trump nominees in there to push your vision through?”
Apparently, when you’re Donald Trump, you don’t worry, especially about facts.