If you cannot find the recently introduced option to remap the Copilot key in Windows 11 settings, that is because Microsoft removed it. Temporarily.
Copilot key RSS
Microsoft a few days ago at CES 2024, debuted its new Copilot button for keyboards as it tries to replicate the success of the Windows key. This new key however may not be mandatory, yet.
In September 1994, Microsoft launched its first ergonomic computer keyboard. In addition to a more comfortable layout, the keyboard introduced the legendary Windows key to the PC hardware world.