Hi,
Correct me if I’m wrong, but do you want to share the Internet connection via Bluetooth to the Alexa? If so, you already asked about Bluetooth tethering here.
We already support HSP/HFP/A2DP profiles via Bluetooth, so if you wanted to use Alexa as a speaker (if it’s possible) - there it shouldn’t be a problem.
If you had any more questions - feel free to ask