Proxmox 7 to 8 Networking Issues

Hi all, I've recently had Proxmox 7 installed on a bare-metal server. I have done nothing on here other than upgrade the server to Proxmox 8 but now my server has no network connectivity. I understand there is a 'problem' with Debian upgrades and NIC name changes, with most suggestions online saying to just update the NIC name in /etc/network/interfaces - but this is not working for me.

Previous to the upgrade I can see the physical NIC used for the vmbr0 bridge is enp5s0f0 (note I also had a 2nd interface, enp5s0f1, when I did 'ip a') - after the upgrade all I have is 'enx1a5b66bedc5d' - this MAC address used in the NIC name is not the MAC that is assigned to the physical NIC on the server, I have no idea what this interface is or where its coming from.

Can anyone please help me to fix the issue with my network ports so I can get the Proxmox server back online? I have tried several guides from other forums and documentation but none of the solutions are working for me.

Update from OVH support: "Your motherboard and NIC are not compatible with the newer version of the linux kernel for Proxmox 8" - great lol.