The Fortnite beta is coming to Android after all. However, it is invite-only, and those who own the Galaxy Note 9 will be the first to have access to these invites. On the other hand, the other restrictions on the game's availability have not been confirmed - yet.
https://www.notebookcheck.net/Samsung-really-does-have-some-Fortnite-on-Android-exclusives-but-perhaps-not-as-many-as-thought.321344.0.html