Unless it's a late Intel MBA, 2018/2019 supported dual external displays!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).
How to connect two or more external displays to an Apple Silicon M1 Mac
Get around Apple's annoying M1/M2/M3 Mac single-display limitation via software and adapterswww.macworld.com