How do you go from one desktop to another
My MacBook Air displays 3 desktops
MacBook Air 13″, macOS 11.7
My MacBook Air displays 3 desktops
MacBook Air 13″, macOS 11.7
An answer depends on how those multiple displays are arranged — mirrored vs extended for example.
Refer to Extend or mirror your Mac desktop across multiple displays - Apple Support.
Do you mean three different desktop backgrounds? You can move between using control right/left arrow.
How do you go from one desktop to another