npx expo install expo-background-task expo-task-manager

import * as BackgroundTask from 'expo-background-task';
import * as TaskManager from 'expo-task-manager';

const TASK_NAME = 'background-task';

TaskManager.defineTask(TASK_NAME, async () => {
  // Background work here
  console.log('Background task executed');
  return BackgroundTask.BackgroundTaskResult.Success;
});

await BackgroundTask.registerTaskAsync(TASK_NAME);