Because the Pixel 6 uses a Tensor (Exynos-based) chip, the traditional Qualcomm tools do not work. While there are experimental guides on forums like XDA Developers that mention using "Samsung Exynos Tools" to repair the bootloader, this is highly advanced and not officially supported by Google.
For most "soft-bricked" devices (where the screen still shows a logo or Fastboot menu), Google recommends using the official Android Flash Tool in a Chrome browser to reinstall the factory firmware. How to Check if Your Pixel 6 is in EDL Mode If your phone won't turn on and the screen is black: Connect the Pixel 6 to a Windows PC. Open . pixel 6 edl mode
If you see an entry like or a generic "USB Serial Device" that appears and disappears, your phone is likely in its version of EDL/Recovery mode. Risks and Warnings Because the Pixel 6 uses a Tensor (Exynos-based)