Why does my external monitor says that display connected to intel iris xe graphics instead of nvidia graphics card

[Demozy4321]

I have a lenovo ideapad gaming 3 and a LG montior which is 144hz.I have used a hdmi cable to connect the external monitor with my laptop but in the advance display settings it shows that the display is connected to intel iris xe graphics instead of nvidia rtx 3050 graphics.And I'm unable to use the refresh rate of the monitor it's stuck at 60hz and does not show higher refresh rate nor am i able to switch on the HRD mode, when hdr mode radio button is clicked the screen flashes and button stays as off.

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