Belkin Ethernet + Power Adapter with Lightning Connector - Apple
RJ-45 Ethernet Female Socket to Terminal Spring Block Adapter : ID 4511 : $7.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: TP-Link AV2000 Powerline Adapter - 2 Gigabit Ports, Ethernet Over Power, Plug&Play, Power Saving, 2x2 MIMO, Noise Filtering, Extra Power Socket for other Devices, Ideal for Gaming (TL-PA9020P KIT) : Everything
The M1 iMac's power supply sports magnetic connector, Ethernet port | TechCrunch
USB-C to Ethernet Adapter + 60W Charge | Belkin | Belkin: US