While I can't confirm first-hand I can tell you that that shouldn't be a problem. Wireless charging isn't anywhere near as picky as it once was. My Samsung from a couple of years ago wears a case and has a metal plate that takes up a massive portion of the rear of the phone for my magnetic mounts. It still charges wirelessly just fine every night on a no name off-brand wireless charging stand. Has for years. I know what you mean about that camera visor across the rear of the new Pixel 6 standing out but my best guess is that you'll be just fine. I'm sure someone will come along to verify first-hand but I'd put a small sum of money on the option for you'll be alright. Excellent taste in cars and phones BTW.
Warning: Pixel 6 rant ahead...
Unrelated but I really wish Google had made a smaller, more standard size version of that phone rather than one massive and one massive-er because I really wanted to like the new Pixel. My wife and I had Pixel 1, 2 & 3 and loved them. Mine was the XL and it was just too large IMO. I have quite large hands and it still just wasn't an easy care-free single-hand-use affair. We went to Samsung S10e (not a bad phone for the money, surprisingly) and when I went back to a phone that was the same relative size as the non-XL Pixels I instantly realized how much better that size profile was after arguing the benefits of the larger XL screen for years. I was fully ready to hop on a couple of standard size Pixels until they revealed that the smaller version of the 6 is the same dimensions of the 3 XL and the Pro is even larger. No thanks. Just venting here because I really wish they had stuck with a true standard and an XL version closer to what every other manufacturer has done for years. Or, at a minimum, make three. Not sure what made them think everyone wanted a phablet in their pocket but I'm really tired of this Samsung bloatware. Looks like I'll be sourcing a couple of used Pixel 5's most likely.