I recently read this thread because of problems getting two Windows 11 virtual machines to see each other using Parallels 18. I tried everything I found in this thread, other threads, and through google searches, but nothing made the computers "see" each other under the "Network" tab of Windows Explorer. I needed to map a network drive so my paralegal had access to Quickbooks Pro 2019. I just happened to stumble across a solution. On the client iMac, my Windows VM ID was listed under the "Network" icon in Finder. I mounted the Windows "server" within Finder. I went into Windows Explorer, which still did not show the Windows server under Network, and typed in the path to the host computer. For example, if the name of the host is "bobscomputa23b," in the path bar in Windows Explorer for the client machine, type in "\\bobscomputa123b" then <enter>. There may have been another step after that, I don't recall, but the upshot is that the client machine connected to the host and I was able to mount the shared folder for Quickbooks.