Turns out the controller went bad and the motherboard needed to be replaced. Dell tech swapped it out and the issue has been resolved. 
Recently upgraded from Win11 to Win11 PRO. After upgrading, my Killer E3100 ethernet controller is no longer working and isn't recognized by the system. It's not shown in the initial list of Device Manager but I am able to see it by selecting View -->Show hidden devices however it's grayed out and shows 'Currently, this hardware device is not connected to the computer. (Code 45)'.  I've ensured:
Aurora R15, Killer E3100 no longer working after Win 11 Pro upgrade