Why is Hello Neighbor only from so few phones?

Have since today yes a new phone, which is better than my old one.
And wanted to see if Hello Neighbor goes on my phone.
But unfortunately not, as well as Fortnite, while I have a good middle class phone. Have the Samsung Galaxy A8.
And think that such games have to run on it too.

Games are always programmed and optimized for specific operating systems (or their distributions and versions). Sometimes games could work on other operating systems, but due to a lack of stability and performance, it is usually not done to avoid negative ratings. It also seems logical, because many users with bad hardware often blame developers for it. (Not related to your case)

It's best to contact the corresponding developer studio via one of their support channels to inquire about the compatibility of the software, or open discussions in suitable forums.

The game is available for Android in the Play Store, but my phone is not compatible. Although I even have Android 9 ♂️

Hihi so neigboir know das.ich wrote it wrong XD is only on iOS so Appel and so on Android not hope I've helped you further