Can I access Apple tv on my tv set or only on my iphone?

Hi Suzcc.

If your TV operating system can access the Apple TV app then yes, if not then no. Search your Apps on the TV to see if you can download the Apple TV app. Most can.

Another alternative as mentioned by Rudegar is to buy an Apple TV device.

Have a great day. 🍻

if your tv support apple tv app Apple TV app - Devices - Apple

or if you have an appletv box

There are more methods …

All the ways to watch Apple TV+ - Apple Support

Get the Apple TV app or Apple TV+ app on your smart TV, streaming device, or game console - Apple Support