Does something like a 1 to 2 Ethernet cable sort of device exists ? Searched earlier on Amazon but it's never clear what their product is used for
A splitter does exist. The way it works is that Ethernet cables have 8 individual wires in them. A minimum of 4 are required for basic connectivity. You can use a splitter to go to 2 computers but would not be able to transfer power (PoE) and you would be limited to 100mb throughout, as opposed to gig.