Connecting two external monitors to MacBook Air M2 with plugable adapter

The M2 MacBook Air only supports one external display – and USB-A ports do not support DisplayPort Alt Mode, period, no matter what kind of computer you are talking about. So if this Plugable adapter is able to drive two monitors, it must be using some second-class workaround, one that requires you to install a matching driver on your computer, and that may come with significant compromises.

I'm guessing that this is what you bought:

Plugable – PLUGABLE USB-C OR USB 3.0 TO DUAL HDMI ADAPTER

In fine print on one of the illustrations: "Not recommended for gaming, graphics-intensive, or design work."

"Compatibility—This dual monitor adapter for laptop is compatible with Windows 10 and Windows 11, macOS 10.14 or later, and ChromeOS 100.x or later. SMI driver installation is required. Not compatible with DisplayLink drivers"

Note that last sentence. This thing is not compatible with DisplayLink drivers. Following links on Plugable's site, I found a page that indicates that some of their workaround products require DisplayLink drivers and others require Silicon Motion drivers. If you try to use DisplayLink drivers with SMI "stunt boxes" or SMI drivers with DisplayLink "stunt boxes" things will not work.

Plugable – Silicon Motion Drivers and Software

The "arms supplier" for the Silicon Motion workaround seems to be Silicon Motion – much as the "arms supplier" for DisplayLink is Synaptics.

I would suggest that if you insist on connecting more displays than your computer supports, and you are having problems with the Plugable workaround product, to contact Plugable.

If the MBA is a 2022 model, it only supports 1 external display. Please refer to the Tech Specs, please look in MacBook Air (M2, 2022) - Tech Specs - Apple Support under Display Support.