I dont think Samsung controls what devices they decide to support. You can request that apple supports your device or view compatible devices on apple's website:
https://www.apple.com/apple-tv-app/devices/
Which devices have the Apple TV app?
The Apple TV app is available on select 2018, 2019, and 2020 (N, R, and T model) Samsung smart TVs, Lifestyle TVs, QLED TVs, and QLED 8K models. It is also available on Apple TV, Roku, and Amazon streaming devices. For a full list of compatible devices, check out Apple support.
https://www.samsung.com/us/support/answer/ANS00082624/
