This is about running 8BitDo's Firmware Update tool for Windows in Wine. It can be used for updating newer 8BitDo devices that may not be supported by fwupd on Linux.
Original steps credit: archeYR/8bitdofirmwarelinux.md
I built a wineprefix with a portable appimage of wine from here.
This tool needs Segoe UI Symbol font. You can install via this script on most setups: Segoe-UI Font on Linux (Ubuntu).
You will have to let Wine access device's HID interface for updating firmware, something like this should work for 8BitDo Ultimate Bluetooth Controller