You'll likely need a dual link capable Bluetooth transmitter. Unless your TV supports that already. Which is not likely. I'd also get a unit which is long range and supports the latest Bluetooth 5.0 standard. For best range don't hide behind TV, glass, metal or other dense materials.
https://www.amazon.com/Bluetooth-Transmitter-Receiver-Wireless-Streaming/dp/B07L69H7N9/
I'd note that while many of these have batteries. I'd leave them plugged in to power. If your TV does not have a USB port to provide power. You will need a USB wall outlet. Don't get a cheap one. Many of those budget ones don't meet any safety or fire standards. Now might be a good time for a decent surge protector if you don't have one. Both listed have USB power...