Google Stand, the wireless charging dock for Pixel 3 devices, is restricted to the official USB-C charger and doesn't support chargers from other brands.
Charge your phone with a Pixel Stand - Pixel Phone Help
Google's Pixel Stand 2 changed my mind about wireless charging
Google Pixel 3, Pixel 3 XL Limit Fast Wireless Charging on Third-Party Chargers; Camera 6.1 Update Rolling Out to Older Pixels
Teardown: Pixel Stand offers faster-than-Qi wireless charging for (some) Google fans - EDN Asia
The Pixel 3 only does fast wireless charging on Google-approved pads - The Verge
Google Pixel Stand (2nd gen) review: Power with finesse
Best Wireless Chargers For Google Pixel 7 And Pixel 7 Pro
2nd-gen Google Pixel Stand specs and price leak with up to 23 W charging, active cooling fan, and choice of two colors confirmed - News
Google Pixel 3 will only use fast wireless charging on certain chargers
Hmmm: Google Created a Proprietary Fast Wireless Charging Solution for Pixel 3
Google Pixel Stand Does Not Support Third-Party Chargers
Google Pixel Stand (2nd gen) can wirelessly charge Pixel 6, Pixel 6 Pro, Pixel 7 and Pixel 7 Pro with the same power you'd get from a wired charger;
Google Pixel Stand (2nd Gen) - Wireless Charger - Fast Charging Pixel Phone Charger - Compatible with Pixel Phones and Qi Certified Devices