Finding bluetooth gamepad on Kodi Krypton

I’m using Kodi 17 nightly build on an Amazon Fire TV box, and am keen to use a bluetooth gamepad.
I’ve tried to pair a SNES30 controller from 8bitdo, which is a great bit of kit, but it won’t pair with the Fire TV and I’ve been down the road of updating firmware and successfully pairing it with phones, PC etc. I’m pretty sure this is down to how pernickity the Amazon device is, considering how many hoops I jumped through to install Kodi on it.
I wondered if I could pair the controller in Kodi Krypton, although I don’t see any bluetooth menu to attempt this.
Do I have to send the controller back and trace another that will pair with Fire?

Thanks for any help.