No -- any such upgrade is on your own.  And bear in mind replacing the screen will void the warranty.
I have a dell xps 15 9500. 1920x1200p i7-10750h 16gb ddr4 512gb ssd gtx 1650Ti   i want to know if I can upgrade my screen to 4K through dell, I know it wouldn’t be cheap if I can.  I know I could go elsewhere and get it upgraded but I would rather pay extra and have it installed via manufacturer, if that’s even an option here. 
Screen upgrade?