First: See and Install 

Then:

Add the following to your ~/.bashrc:

export DISPLAY=$(awk '/nameserver / {print $2; exit}' /etc/resolv.conf 2>/dev/null):0
export LIBGL_ALWAYS_INDIRECT=1

Enable Public Access on your X11 server for Windows.*

Add a separate inbound rule for TCP port 6000 to the windows firewall in order to allow WSL access to the X server, as described by the wsl-windows-toolbar-launcher people.

Source: https://stackoverflow.com/questions/61110603/how-to-set-up-working-x11-forwarding-on-wsl2