This is an annoying answer...
If she has a MacBook Air, then she'll need a dock that supports 2 monitors over USB-C since the MacBook Air only officially supports 1 external display.
If it's the MacBook Pro, then she'll just need cables as she can direct connect the monitors to the machine (it supports a minimum of 2 external displays).
Get around Apple's annoying M1/M2/M3 Mac single-display limitation via software and adapters
www.macworld.com