Although the Google Pixel 9 Pro XL charges a little faster via USB-C, wireless charging is still only possible at a leisurely pace via Qi charging pads. Even though Qi2 is already available. Google explains why the latest Pixel flagships do not utilize the new charging standard.https://www.notebookcheck.net/Pixel-9-Pro-is-not-Qi2-compatible-Google-explains-its-decision-to-forgo-magnetic-fast-charging.875789.0.html
My wild guess is the Pixel 9 gets too hot for Qi2 to work reliably.