Amazon.com: QNAP QXG-10G2TB Two Port 10GbE Network Card Supporting up to Five speeds (10GbE / 5GbE / 2.5GbE / 1GbE / 100MbE), and maximizes Your NAS and PC Network connectivity : Electronics
Testing 2.5 Gbps Ethernet on the Raspberry Pi CM4 | Jeff Geerling