You need to download the DJI Fly app from DJI's website - DroneDJ
Amazon.com: DJI Mini 2 Fly More Combo – Ultralight Foldable Drone, 3-Axis Gimbal with 4K Camera, 12MP Photos, 31 Mins Flight Time, Case, 128gb SD Card, Landing pad Kit with Must Have
DJI Fly App Complete Walkthrough for the Mavic Mini - YouTube
DJI Fly App: User Guide for Mavic Mini / Mavic Air 2 - DJI Guides