nicstevens80 wrote:
So question... I have a Dell Thunderbolt dock and then I have a Hiearcool USB C Hub, USB C Adapter, 7 in 1 USB C Dongle USB-C to HDMI Multi-Port Adapter Compatible for Thunderbolt 3 4 MacBook Pro Air Dell Lenovo HP Laptops and Other Type C Devices. When I plug in the dock, I get one monitor. Then I plug in the Hiearcool USB Hub into the other port on the machine and no matter what I use (HDMI, USB, USB-C) it won't see the other monitor.
I can plug both monitors into the Dell dock but it won't recognize them as being different it just sees both as one dock
Thunderbolt docks that support two monitors rely on using hardware video support provided by the computer. I don't ever think I have seen a Thunderbolt dock that supported DisplayLink or similar workaround technologies.
The M2 MacBook Air only supports a single external display, and thus a Thunderbolt dock connected to the M2 MacBook Air will support at most a single external display. (There is no second hardware video signal available that the dock can repackage.)
I would guess that the USB-C hub you are talking about is this one
https://www.amazon.com/Hiearcool-MacBook-Multiport-Compatible-Nintendo/dp/B07WPTG7NX?th=1
and that it also wants to see a hardware video signal from your computer – which only has one to offer.