GoKawiilApple's Sidecar and Universal Control turn an iPad into a Mac second screen
Apple offers built-in tools called Sidecar and Universal Control that let Mac users extend or mirror their desktop onto an iPad, effectively turning the tablet into a second monitor. Both features require the Mac and iPad to be signed into the same iCloud account, with Universal Control also needing two-factor authentication enabled. Windows PC users cannot use these native tools and must rely on third-party alternatives instead.