Is it possible to play fortnite on a smartphone with a gamepad?

Is that possible? Can someone say something to me

Will Bluetooth controllers be supported on Android devices?

Yes. We recently added Bluetooth controller support for mobile devices in Patch v7.30. We support most Bluetooth controller adapters, such as:

Steelseries Stratus XL

Game Vice

xbox1

Razer Raiju

Moto Gamepad

https://www.epicgames.com/.../en-US/faq

For wired controllers should count the same.