My XPS13 is constantly throttling and I found that with an external fan the performance of the laptop is much better.
Standard cooling pads often have just one strong, but very noisy level, so I designed my own cooling pad to mount an external and adjustable USB fan, which has 3 different levels where level 1 is often sufficient but less noisy.

external USB fan I used: https://www.amazon.de/dp/B06XQWMFDQ

I've printed it in PETG as the laptop can get warm, but I guess PLA would also work fine.
For an easy print, I created three different parts that I glued together afterwards. Not the most appealing solution for 3D printing, but made designing and printing simpler.

I guess much bigger or more heavier laptops than an XPS wouldn't work or would need a redesign.
I also added the step files if you want to make edits. Because I think the holes for the screws were not really good aligned with the fan.