I know it works, but the only way to reliably use it is to unsquash the filesystem, copy the 360 config, rename it, and then resquash the filesystem…
The autoconfig files are located in /etc/retroarch-joypad-autoconfig This drive is part of the read-only squashfs file system I tried modifying the retroarch config file on Storage, but every time I restart Lakka it overwrites it.
Copy the Microsoft_X-Box_360_pad.cfg to Microsoft_X-Box_One_pad.cfg In the new config change to: input_device = “Microsoft X-Box One pad” input_product_id = 721