Click Control Center in the menu bar, click Screen Mirroring and choose the TV.
The steps to show a Mac's screen on a TV with AirPlay, under the heading AirPlay: Control Center in the menu bar and Screen Mirroring as Apple calls them in macOS in this language (use Apple's own words in the language)
Pāwhiria te “Control Center” i te pae tahua, pāwhiria te “Screen Mirroring”, ka kōwhiri i te pouaka whakaata.