That could be a problem. Regardless of color or styling, a USB thumb drive jutting out of a computer is not an aesthetically pleasing look Apple is likely to want to feature in ad. photos.
Of course, there is a way around that...use a USB-A style thumb drive, because you can put a good deal of the circuitry in the part that goes in the port, leaving only a 'button' exterior, and you can make these things fast with the latest specification. But there's one problem...that would require the host computer have a USB-A port, and oh, snap! There's the M4 series Mac Minis... You could use a USB-A to C adapter or cable, which defeats the purpose and 'uglyfies' it.
I don't see Apple doing this unless they devise a way to get substantially higher performance. And imagine what they'd charge for the thing!
Probably your best bet is to find a 3rd party product that roughly matches your Mac's color and is compact.
Can you link whatever you've found that came closest to what you want?