Like every smartphone supporting Qi wireless charging, the Pixel 8 just passed through the Wireless Power Consortium certification process. Unfortunately, the listing contains a placeholder image of the Google Pixel 6, so it doesn't reveal the design. The model number GKWS6 checks out, though.
Interestingly enough, last year's Pixel 7 family appeared on WPC's website a week after release, so the Pixel 8 popping up this early could be signaling an earlier release.
Either way, the Qi charging is once again rated at 12W, shutting down rumors and speculations about support for the newer Qi2 standard, announced in January this year.
