The latest Google charging accessories can charge your new Pixel 6-series device at up to 30W, if not for free. The Pixel Stand 2 can go at up to 23 watts (W), whereas the latest wired charger from the Mountain View giant supports the USB-PD 20V/1.5A standard. However, neither are free, not even with a new phone.
https://www.notebookcheck.net/Google-announces-new-charging-accessories-for-Pixel-fans-who-might-now-really-need-them.574030.0.html