from fedora do “arp -a”. You should see the IP address IF one is assigned.
However, you have to somehow have an address assigned to the device either through DHCP (you can use your system for that) or you have to login through the admin account. Both your Fedora machine must be on the same network with different IP addresses.
Connecting a network cable between 2 machines doesn’t guarantee they can talk to each other. The must be on the same network. That has specific meaning in the IP world. If you are not well-versed in the details of IP networking, you need to find someone who is.
You could connect both machines to a small router that is a DHCP server as long as your machine and the sharespace are also DHCP clients. Then they will talk to each other. Also, connecting just a networking cable between machines requires it be a cross-over cable, not straight-thru.