You can purchase a device called an Ethernet Switch that allows you to split a single port into multiple. You don't need a smart/managed switch for this. Make sure to not connect an Ethernet cord in a loop from/to the switch.
Once you have the switch, connect any port to the wall jack, then connect your devices to the remaining available ports.
If you have any issues with connection, check your device's registration. Your wired MAC address for any connected device must be registered.