BCM94352Z "Turn WIFI On" Not Working

[bloodstream]

I don't know what you can do about the keyboard backlight, but about your trackpad - There's a good chance it's connected via I2C. Try reading here (please comment there with a copy of IOReg and your DSDT if you can't make it work):
https://www.tonymacx86.com/threads/wip-voodooi2c-i2c-trackpad-limited-support.204227/

Thank you very much. I will test this again if it works. I'll let you know.