Thanks for reaching out and welcome to the Bose Community!
To use your universal remote with the Amazon Fire Stick, please follow the following steps:
I hope this helps, let me know if you need any further assistance.
Vicky W - Community Support
Sorry to hear that this doesn't work. I believe that you cannot programme your remote using a code. This is because the Amazon Fire Stick is controlled by a Bluetooth remote. However, be sure that any CEC setting within your TV and Amazon TV settings are enabled. This should give you the ability to control your Amazon TV without the need for programming the remote codes.
Let me know if you need any further help.
I've been looking into this and it seems that it is only possible with a universal remote that also uses Bluetooth. This isn't the case with the universal remote with the Lifestyle 600.
Apologies for this inconvenience.