It doesn't appear there is a default keyboard shortcut.  Check in two places:  first, UEFI setup (F2 at powerup) -- is the integrated GPU enabled there?  And second, check in the Alienware Command Center utility.

You could try setting the nividia control panel to set all graphical stuff to the intel UHD?

just look inside the control panel and then see the PhysX options.

So after a bit of researching I realised that with g-sync, the iGPU is basically disabled, cus the screen needs the nvidia gpu to run. As you can see below, instead of having a second step to choose between integrated graphics and high performance nvidia processor, it seems to lock itself to nvidia gpu only.

My question is, is there a way to disable g-sync such that the iGPU is functioning? I tried to disable g-sync from the 'set up G-sync' tab of nvidia control panel but the Intel graphics is still not getting workload. I wanted to project my screen onto a classroom projector (using HDMI). Can I still project using my Nvidia display instead of intel? This is my device manager in case you're interested.

@Frost. Hi, I have same problem with you, have you figured it out how to switch to integrated Intel GPU card?

My laptop is brand new Alienware m15 R4 RTX 3070, i7 10th generation.

What’s the refresh rate of your screen? 60hz and it may be possible but only if you have the icon at fn+7