Unable to find Apple TV+ app on my Samsung smart TV

What is the exact model Samsung TV?

What was the introduction year for that model? Samsung TV models from 2016 or earlier are unfortunately not supported with a native app. Standalone Apple TV+ app launches on ‘older’ Samsung TVs (2017–) too - FlatpanelsHD.com

Apple TV app for Samsung TV or Apple TV+ app for Samsung TV platform.

Unsupported TVs can still use the Apple TV app from a TV-connected external HDMI streaming device. Such an external streaming device could be the Apple TV box, Roku, Fire TV, PlayStation (4, 5), Xbox (One, One S, X, S), ‘Chromecast with Google TV’-dongle, Nvidia Shield TV, or select cable TV boxes that support apps.

it's not out for all smart TVs

Apple TV app - Devices - Apple (EG)

not sure if they keep the list updated though

otherwise

How to watch Apple TV+, MLS Season Pass, and more - Apple Support