Why does my Galaxy S22 device's screen appear to be flickering during wireless charging?

If you are using Standard mode of Motion smoothness, on the previous wireless charger, there may happen interference between charging frequency of wireless charger and scan frequency of display.

So sometimes you can see flickering tenuously on the display, you may change motion smoothness option to be ‘Adaptive mode’

Go to Settings > Display > Motion smoothness > Adaptive.