Ah yes, the old "is it in Settings or is it on the Control Panel" trick. Found it.
But, to be letter perfect, it's found (at least on my machine) from Control Panel > Network and Internet > Network and Sharing Center > Change advanced sharing settings.
Still not sure why File Explorer was saying...
I just updated to Win11 and I'm trying to get network discovery turned on so the computer can be seen on the rest of the network.
I would expect to find network discovery on the Network & internet > Ethernet page in an expanded section under "Private" (network profile type).
I suspect it's...