Yea ofcourse. The wireless Dex is only available for Galaxy Note 20 series i think 

How do I do it please? 

Android 9 

Still your phone is original brother. Mobile Manufacturers vary features depending on a particular region as I have said earlier. Different marketers can sell different phones bought from different locations. Same Samsung Galaxy but manufactured in d...

Yea, all of them are original depending with your taste and regional policy. That doesn't negate the absence of fake phones out there. You can authenticate your Samsung phone through authentic Samsung dealers OR using it's IMEI NO. on this website w...