Windows desktop is not extended to external LG display

I found the solution :-) You have the to Win+P. To extend the display .

I have 2019 27" inch Mac and an a LG lg 27ul850 external display connect thru usb-c,

When I using my Mac normal I extend my desktop to the external screen, no problems.

Yesterday I installed BootCamp with windows 10, and now I see the same desktop on both screen. But I want to extend my Windows desktop , so I can work on 2 screens.

I have tried to change ucb-c connection to hdmi, update the drivers but the results stays the same.

When I check the display settings, I see 1|2 ( see screenshot) When I click on Identify 1|2 is showing on both screen. When I click on Detect I get an message "Didn't detect another display"

Can someone help me with this problem so I can extend my Windows Desktop

Thank you.