Air Traffic Worker Reveals Most Control Towers Shut Down at Night in Viral TikTok

What is interesting, however, is the fact that the article mentions that “Many of the towers already are closed overnight, and during those periods, the radar facility with oversight of the area takes over in that airspace. The same arrangement will prevail under the new closure times, the FAA said.” So it seems like there is some official documentation to back up what @doaviation claims.