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This article links to Apple's documentation for connecting to AirPlay on a Mac, iPhone, iPad, and iPod Touch. AirPlay is also called "Screen Mirroring" within macOS and iOS.
tv Availability
Apple TVs are installed in most classrooms and conference rooms. Each Apple TV is named according to its location: commonly, it will be displayed as the building name (or initials) followed by the room number, or simply the room's name where appropriate (e.g., conference rooms).
You must be connected to a PLNU wireless network before you can Mirror your display to an Apple TV. Need help with connecting to PLNU-WIFI? https://help.pointloma.edu/TDClient/1808/Portal/KB/ArticleDet?ID=34316
Instructions for macOS
https://support.apple.com/guide/mac-help/stream-video-and-audio-with-airplay-mchld7e543a0/mac
Instructions for iOS and iPadOS
https://support.apple.com/en-us/102661