Can I download Apple TV on my Samsung tv

You will need to use the specific model number for the particular Samsung TV in use, and use that determine whether Samsung offers support for Apple TV app.

If you wish somebody here ro look up that information, you’ll need to post the full model number of the Samsung TV here.

General info on installing Apple TV app:

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

List of models, though Samsung may or will have a more current list:

Apple TV app - Devices - Apple

Samsung information on support for Apple TV:

https://www.samsung.com/us/support/answer/ANS00082624/

An external Apple TV device will also usually work, as an alternative.