the app is called AR-ZONE. Here https://samsung-ar-zone.de.uptodown.com/android you can also just search ar- zone samsung
Thanks for the clarification!
Unfortunately, AR-ZONE does not appear to be a platform for developers.
I searched for the following:
"developing content for samsung ar-zone"
"custom content for samsung ar-zone"
"samsung ar-zone sdk"
"adding your own animations to samsung ar-zone"
And nothing relevant came up. The only search results I got was related to customizing the emoji character.