If you cannot see your device on the list of available Bluetooth devices from your TCL Fire TV, try these following steps.

• Make sure Bluetooth is turned or enabled on for your device.  Refer to your device's user manual.
• Turn off your device, and then turn it back on.  After your device has restarted, try to pair it again.
• Unplug your Fire TV for 10 seconds, and then plug it back in. When your Fire TV is on, try to pair it again.
• Check if your device connects to other devices, such as a phone or tablet.
• If your device connects to other devices: Reset your Fire TV to factory settings. 
• If your device doesn’t connect to other devices, check that your device has up-to-date software or contact your device’s manufacturer for additional support.