I graduated three decades ago and my experience was that any school that was of reasonable size had both.
Our lower-middle class/upper-lower class suburban high school had about 1,200 students in 10th, 11th, and 12th grades (9th was junior high). We had a theater/auditorium for the drama club (and band and orchestra), which presented several performances a year.
We had a small television studio where the AV club ran all the equipment to produce crude programming for the community access channel. The AV club was also responsible for maintaining, storing, transporting, and operating any video or audio or film equipment that teachers might request for special class content.
I’d say this was pretty standard for large suburban school districts and probably for urban schools as well. I can’t think of a single public high school on our immediate region (there were about 16-20 of them) that didn’t have comparable facilities. The “rich” suburbs had even more than we did. Very small rural districts might not have all that.