I think his previous answer is: it’s a standard Linux computer. The internet tells you how to configure Linux (specifically Linux networking). Whether that answer is sufficient I don’t know.
He also suggests using NetworkManager. I can confirm that on my desktop computer, using Settings / Network / (connection)Settings / IPv4 … the option “shared to other computers” does exist. What that option does I can’t say but surely your starting point would be to follow that advice and use that option?