server in VM no detectable

Hello,

I'm on mac OS Big Sur, so i installed windows 10 on VirtualBox to install VirtualHere.
installation ok and if i install the client on this VM i see my USB drive.

But on my real client, an other computer with windows 10 on my local network i can't detect the serveur.
All computers are connected by a simple switch.
I stopped the firewall, i re installed "Bonjour", i indicated the IP of my VM and my Mac...

I don't know what to do anymore ...