Meta Machine Learning Engineer interview questions

I was recruited on LinkedIn. The first interview was a standard code interview, however, I barely understood a word of what the interviewee said. I was underprepared and nervous, and well, you get the picture. It was a total mess.

Got ghosted by recruiter totally. Interview process is smooth and was told to get feedback in 3 days. Now I have not heard back for 3 weeks. This is anything but professional.