I would definitely try other cables, as mentioned, just to rule it out. Check device manager and see what it's showing up as. If it's under "portable devices" as an mpt device, you're having a similar issue as me. You could try to update the drivers...
Using the hub made the camera work with everything for me. Eos Utility, astro apps, etc when it didn't work with anything at all before then. Obviously, this isn't the answer for everyone, nor do I expect it to be. But I just wanted to mention it in...
To be clear, we are using a passive hub and it does work. I just noticed your comment that "passive hubs do not work, at all". I spent 6 hours with my EOS R last night doing astrophotography, which has a high bandwidth demand, through the passive hub...
Obviously this isn't a preferred solution. But it's literally the only option we found after 3 days attempting every known solution. My friend is a competent software engineer who also has a solid grasp of hardware like I do, and even with the both o...
I just want to add for future readers that might stumble across this with the same issue I had, and have tried every possible solution, as did I, that using a USB hub between the camera and laptop fixed my issue. We spent 3 days going through every p...