My experience was that the school provided free Windows keys for a personal computer if you needed one (they didn’t provide the computer itself) but the majority of computers I interacted with on campus (mostly in the computer lab) were Linux (some Debian variant iirc). I think the printing computers in the library were windows. I took an art class at one point and they had Macs (it was for using the Apple’s Final Cut Pro).
We never used LibreOffice though. Everyone just uses Google Drive.