source : https://stackoverflow.com/questions/61002681/connecting-to-wsl2-server-via-local-network

in powershel as administrator

netsh interface portproxy add v4tov4 listenport=3000 listenaddress=0.0.0.0 connectport=3000 connectaddress=172.30.16.3

need to create a firewall rule :

netsh advfirewall firewall add rule name= "Open Port 3000" dir=in action=allow protocol=TCP localport=3000