Two MacBook Air computers
Apple’s Clamshell mode has existed for a very long time. In short, Clamshell Mode allows the user to connect an external display, and shut the lid. Depending on user choices, the main display will then generally be displayed on the external monitor.
On the M1 and M2 MacBook Air, you could only have one external display, regardless of the lid position. So, when you’d shut the lid, you’d get that internal display, mirrored, to the external with no option at all for a second external display.
Go Here to Read this Fast! How to use two monitors with M3 MacBook Air
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How to use two monitors with M3 MacBook Air