Hello,
You can use Microsoft PowerToys to remap the Copilot key. PowerToys is a Microsoft utility that allows you to have more control over your PC.
To remap the Copilot key, first, download Microsoft PowerToys from GitHub or search PowerToys on the Microsoft Store. If you got PowerToys from GitHub, then run the installer and once it's done installing, open PowerToys. If you got it from the Microsoft Store, once it's done installing, open it.
Then, you should see the first run screen. You can close out of that and open it again, or you can go straight to where it says "Remap a shortcut". It should give you a set of buttons, push the button that says "Add new". Then, when it asks you what shortcut you would like to remap, if it asks you to push a key, push the Copilot key. If it doesn't, in the dropdowns, select Windows Key+ Shift (Left) + F23.
Then, remap that shortcut to open whatever app you see fit.
Let me know how this goes and Happy Holidays!