As sourced from reddit https://www.reddit.com/r/bashonubuntuonwindows/comments/1b5mhd9/pyvirtualdisplay_hangs_forever_on_wsl2/?rdt=37413

First update your WSL

wsl --update
wsl --shutdown

Then in your python code set the PYVIRTUALDISPLAY_DISPLAYFD environment variable to 0 prior to attempting to start the virtual display.

import os
os.environ['PYVIRTUALDISPLAY_DISPLAYFD'] = '0'


from pyvirtualdisplay import Display

virtual_display = Display(visible=0)
virtual_display.start()