There are lots of solutions that are more seamless than the DSLR, but which are vastly more expensive, including just buying a webcam proper. But the fact that you _can_ use the DSLR as your webcam is cool, and may save some folks money if they happen to have a DSLR laying around.
The problem with buying a webcam proper is that the industry has reached a "good enough" point where manufacturers will re-release essentially the same camera with no real improvements in resolution, hardware, or software.
I bought a Logitech webcam during the pandemic. Imagine my surprise when the webcam resolution was worse than the one built into my XPS 13.
This is frustrating, I thought that the pandemic was going to create a demand for high quality webcams. I'd settle for a 4K phone quality. I bought the Logitech Brio thinking I'd get better picture than my phone (since it's a dedicated camera), which was a bit of a disappointment. I don't think it's terrible, but I had higher expectations of it.
The XPS has a 1080p camera. Were you trying to buy a 4K webcam and accidentally bought the super cheap 720p Logitech sells?
Opal C1, Instalink, continuity cam/droidcam, and a DSLR/mirrorless setup like in this article are essentially your upgrade options if you don’t want to pay for a 4k Logitech.
This works better than the Canon EOS Webcam utility for me, even though my DSLR isn't officially supported. It works fine in Zoom. Unfortunately it doesn't work in Quicktime. I'll take a look at some of the code signing info in your docs and see if I can fix it.
Similarly, I can recommend Reincubate Camo, works on macOS/Linux/Windows. It also has plenty manual camera settings to play around with to get the exact view you want, including focus/white balance/exposure/cropping and tons more that the Apple's official continuity functionality lacks.
Disclaimer: zero affiliation with the product (outside of being their happy customer). I simply found it way before the official continuity feature was even announced for macOS+iOS.
