When it comes to webcam support, Switch 2 supports 3rd party cameras - but only bad ones.
In my go-to stack, only my disposable Logitech Brio 300 works - and everything else I use is a "real" camera, which do not work. My running theory is that the Brio outputs video as Motion Jpeg by default (which is why its video quality is awful), and everything else I have on hand outputs using a modern codec by default.
Sony FX30 - Recognized as a microphone (and works as a microphone)
Generic HDMI to USB-C adapter - Recognized as a microphone (but no audio)
DJI Action 5 - Recognized as a camera, but no video displayed (possibly disconnecting itself, not sure)
Not that it matters, so far the "C" button is exactly what I expected it to be: An incredibly annoying popup generator that I accidently press every single time I'm trying to get back to the home screen (and probably will never in my life press on purpose). Just like the screenshot button, except now a lot closer to the button I'm trying to press. No idea why they couldn't just make the screenshot button assignable to this functionality - or at least put the two useless buttons next to each other.
So yeah, they decided to keep a dedicated button to use a camera that was almost certainly removed from the original design. The console seems less like a thought out and refined as a sequel to an obscenely successful product, and more like a first attempt at a new take on a kid's toy - which happened to come out 3 years later than it was probably supposed to. It feels like the level of design refinement of the original non-lite DS as opposed to a 3DS... Except the DS had budget-priced games, and hardware that didn't cost more than an iPad.
Playing a Switch 2 feels exactly like playing a Switch. Not the good Switch, a launch Switch... except slightly worse because it's bulkier, heavier, more expensive, and they force you to sign a legal agreement preventing you from owning the hardware you just paid for.
IMO they should have just skipped this "2022" design, and just launched with whatever 2025 midcycle refresh that we probably would have had by now, if not for Covid making demand massively surge for the Switch at the end of its life. Whatever they've been doing to develop Switch 2 with the extra time they were given from the Switch's life extension, I don't think it was put into improving the launch offering.
Anyone who didn't get a launch Switch 2 - just wait for a year. Wait for the next Mario.
We'll probably be seeing an accelerated release schedule for improved hardware, lower prices, or both. The good games aren't even released - they aren't even announced.... so you're super not missing anything. Just let the scalpers waste money passing all the launch consoles back and forth for awhile. It's not a big deal.