No matter what television you have, Echo can be given the power to control it.
How to Control Your Fire TV with Your Echo Device, by Fire TV
How to control your TV with Alexa
Fire TV Stick 4K with Alexa Voice Remote (Includes TV controls) B08XVYZ1Y5 - The Home Depot
I replaced my kitchen TV with an Echo Show 15 and I kinda liked it
Sound Upgrade: How to Use Your Echo as a Speaker for Your Television
How to Control Your TV with Alexa
How to play audio from Fire TV on Echo. wirelessly - Tech Advisor
How to Voice Control TV and Set top box with Alexa, TV Automation
Use Alexa with your Samsung TV or smart monitor