Hi @kionbo2,
Thank you for your first post here in the Roku Community!
We acknowledge your concern about the Alexa problem since it could not adjust the volume of your Roku TCL TV; we're happy to help. Please try to restart your Roku TV by going to Settings> System> Power> System Restart.
For more information and troubleshooting steps, refer to this support article on using Amazon Alexa to control your Roku streaming device.
Please keep us posted on what you find out.
Best regards,
John
John
Roku Community Moderator