Greetings,
My name is Rhaine, I'm Independent Community Advisor. I’m so glad assisting you today
I am also Windows user. Let us work together to sort this out.
Some keyboards have a Game Mode button either on the physical board or within software. This function also breaks the WIN + P functionality. If you turn it off it will allow you to switch between displays again
Here's the link on how to disable the Game Mode as reference
https://www.windowscentral.com/how-enable-disab...
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
I hope the information above helps. Please let me know how it goes.
Have a wonderful day ahead and stay safe.
With Warm Regards,
Rhaine C.