The FCC has published its Pixel 6 and Pixel 6 Pro listings, which spans six devices. All models support Wi-Fi 6E connectivity, a jump from the Wi-Fi 5 coverage that the Pixel 5 and Pixel 5a offer. A UWB chip will not be available across all models though, and could be confined to just the Pixel 6 Pro.
https://www.notebookcheck.net/Google-Pixel-6-series-confirmed-to-support-Wi-Fi-6E-in-FCC-documents-UWB-only-for-the-Pixel-6-Pro.562917.0.html
Great to see that WiFi 6E is gaining some traction.
"Incidentally, the Pixel 5 and Pixel 5a support Wi-Fi 5, with Google skipping Wi-Fi 6 and jumping straight to the latest Wi-Fi standard, instead."
This sentence is a bit misleading. Neither Wi-Fi 6e, nor Wi-Fi 6 is a "standard" - it's a marketing term introduced by the Wi-Fi Alliance. Both Wi-Fi 6 and Wi-Fi 6e (6GHz only, no backward compatibility to previous dot11b/g/n/a/ac) are using the latest Wi-Fi standard IEEE-802.11ax. So Google is not "skipping" Wi-Fi 6 (which is 2.4 and 5 GHz "only").