I have a 3 monitor setup at home for the days I WFH.
My work, and personal computers are Dell Latitude & the docks is a WD22TB4

Docked my wife's work laptop, a 2020 Macbook Air M1.
Only have 2 options. Leave the laptop open, and all 3 monitors are a single duplicated second screen, or close the laptop & the 3 screens are only able to be duplicated, not extended.

Is there a way to allow extending the desktop to 2 monitors with the computer closed?
I'd rather not deal with disconnecting the displays from the dock, but it's an option if that's the route needed.

I sure do hope you find a great solution, for I'm looking for it too.

I'm 100% not an Apple user, so I'm completely out of my element on this one.

Poked around the settings & didn't see anything obvious

I think that’s what the M1 model supports. 2 pipes, 1 each dedicated to the lfp and an external display.

I moved to MacBook Pro in later models to get better multi display support 3 pipes.

So no option for 2 external displays with the screen closed?

I knew there was driver funkyness with Mac + Docking.
Brave's AI told me this:

The Dell WD22TB4 does not contain DisplayLink technology. It is a native Thunderbolt 4 docking station that relies entirely on the host computer's graphics capabilities to drive displays.

Consequently, installing DisplayLink drivers on a Mac or any other system will not enable additional display outputs or bypass hardware limitations, as the dock lacks the necessary internal chip. Users seeking multi-monitor support on Macs (which often have native display limits) typically need a dock that explicitly integrates DisplayLink technology, such as the Dell WD6000 or Dell UD22, or must utilize the Mac's native ports with specific cabling constraints.

quote:

Originally posted by konata88:
I moved to MacBook Pro in later models to get better multi display support 3 pipes.

Dang! I should have bought the Pro!

I remember asking about this shortly after I bought this Air, and several of the answers were similar to konata’s statement — the chip in this one just doesn’t support non-duplicate external monitors.

Thanks, snidera, I'll see if she can manage with the laptop screen & an external display