10Gb port on 2018 Mac mini disappeared
"I have a 2018 Mac mini, with the 10Gb Ethernet option. The port just one day disappeared."
Sounds familiar? Happened here too.
I was blaming it on the macOS 13.5 upgrade, which immediately preceded the failure, but I've since reinstalled macOS 12, and the port is still not available. Looks like I'm on my way to the Apple store.
Mac mini (2018)