Amazon.com: Lenovo 4X90E51405 Thinkpad USB 3.0 Ethernet Adapter for Compatible Lenovo Models : Electronics
New OneLink+ to Ethernet Adapter Interface Connector Cable For Lenovo ThinkPad Yoga 260 460 X1 Yoga Cable X1 Carbon 20FB 00JT801 - Newegg.com
There, I Fixed It: Lenovo X1 Carbon 6th Gen Ethernet Port + Thunderbolt Port fit : r/Lenovo
StarTech.com 2.5GbE USB A to Ethernet Adapter, NBASE-T NIC, USB 3.0 Type A 2.5 GbE /1 GbE Multi Speed Gigabit Network, USB 3.1 Laptop to RJ45/LAN, Lenovo X1 Carbon, HP EliteBook/ ZBook