Nvidia Graphics Card not detected

A few days ago while I was playing the DLC of the Elden Ring , the game automatically started to run on a very wierd graphics (lower than low graphics) and started lagging a lot. I quit the game and checked on my taskbar both my Nvidia control panel and display settings were gone. Since the graphics card showed sometimes when I booted my PC up but most of the times when I checked the device manager the graphics card were hidden. Recently it does not even show up in the hidden devices either. I just wanted to complete the game and then stop gaming for the last time. Can anyone help?