X870E Taichi Lite Ethernet Issue

Hi,
I just tried using my ethernet today and when I plug in the cable, the status in Windows says "Network Cable Unplugged."

This is a new build. What I have done and checked:

* Windows 11 Pro is fully updated.
* Installed all chipset and device drivers using the ASRock update utility.
* Device manager shows no warnings or unrecognized devices, even with hidden ones showing.
* The MB WiFi works.
* Device status in Device Manager is "This device is working properly."
* I couldn't find anything in the event logs, but you all know how difficult that can be sometimes.
* The BIOS is updated to the latest version
* LAN is enabled in the BIOS


Things I have tried:


* Everything on the microsoft support page: https://support.microsoft.com/en-us/windows/fix-ethernet-connection-problems-in-windows-2311254e-cab8-42d6-90f3-cb0b9f63645f
* Disabling/re-enabling my WiFi
* Three different ethernet cables, all of which have been validated to work on my old computer: I plug each of them into the old computer, have a valid connection, unplug and then plug into the new computer and have "network cable unplugged status."
* Logged in to my router to make sure I hadn't done anything funky with DHCP. As of now, I only have a single reserved address which is for my old computer and a couple hundred free IPs.
* I've run the 'Diagnose this connection' wizard and it tells me I need to plug an ethernet cable into the port.

This MB is only 32 days old, I really, really hope ASRock has some good support.

Thanks.