Yes, I have a file sharing enabled and a folder shared with Everyone account with RW permission.
at "Network" I don't see other devices only me.
If I input manual IP of other pc, I can access without problem but with name no. Same If other PC input manual my IP static it's ok, with name no.
Now I try with WIFI connection, with other hardware of Ethernet and the problem is the same, then I think that anythings on Windows.

I disable Windows Firewall, but nothing.
It's possible Windows Defender ?
With McAfee, windows defeder is disabled right?