Using Wio Terminal as display for Raspberry Pi. Can I turn off the LCD screen from the RPi?

Hi, I managed to successfully use the Wio Terminal as a USB display for my Raspberry Pi using the instructions here Build a HMI Display for Raspberry Pi using Wio Terminal - Seeed Wiki

Does the driver support turning the LCD backlight on/off ? How? (I can use either versions of the Wio Terminal .ino files in my application)

I’d like to be able to use that to turn off the screen programmatically after I stop interacting with the system for a few minutes.
This is from an Raspberry Pi Zero and I am not using an X server or a desktop system.