the problem is it performs very less than the benchmarks i saw on the internet and i played using the I GPU (iris xe) and it feels better .
We're going to need information, such as screenshots to corroborate your findings. If you're using YT as a gauge then please parse links to said videos.
What BIOS version are you on for your laptop? OS version(not edition) if you're on Windows 10? Which driver version are you on for your Nvidia GPU? Where did you source the game that you're taxing the laptop with?
Lastly, that laptop isn't really meant for gaming, the specs of the laptop and the design of the device itself is geared towards people on the go and needing a system to work off of, much like a photographer or perhaps an architect to give presentations to clients with their renders, not to physically tax the laptop with demanding tasks. In fact, the laptop is advertised as a Business Laptop by Dell themselves.