You cannot install a driver to "use" FEL mode for everyday tasks like data transfer. Instead, FEL is a special engineering mode triggered when a device's main storage (NAND flash, eMMC, or SD card) is empty, corrupted, or when a specific hardware button combination is held during boot.
When your device enters this mode, its USB controller presents itself to your PC using this specific Allwinner USB identifier. You will likely encounter it in one of the following scenarios: usb device-vid-1f3a-pid-efe8- windows 11