Reagle smart deadbolt is Apple HomeKit-certified and iOS users can access the lock remotely and set up automation via Apple HomeKit technology. You need to connect the lock with HomeKit and then set up Apple TV, HomePod or iPad as a home hub. Some additional configurations in your iPhone are also required as Apple specified in Apple support: 

Please do set it up accordingly and the connection between the lock and the Home hub will be set by Apple automatically.