Do this if Fastboot not working or detecting your Android device on Windows 11/10. Fastboot binary is a protocol that is used for sending commands to your phone over USB.

Google USB Drivers are required to connect Google Pixel or Nexus devices to Windows PC using a USB cable. Google USB drivers act as Android ADB and Fastboot Drivers that allow your computer to ...

Both of these tools come with the Android SDK, however that’s an extremely large download that, frankly, most users who are interested in ADB and fastboot don’t need.