Waveshare 4.20in 4 gray scale?

ESPHome
1

Hi all,
I want to display a picture on my waveshare with it.image command on esphome.
The 4.2 inch is capable of 4 gray scale but it display the picture only on black and white.
Did you know what to do to display in gray scale?

2

Which of the supported devices is it?

3

Model 4.20in
This is the waveshare web site of this model https://www.waveshare.com/4.2inch-e-paper-module.htm