You wanna add countries in your laravel App just use this as a seeder

CountryTableSeader.php

<?php
/**
 * Country Table Seeder
 * @required Laravel 7+
 * @author Muhammad Saim
 * Please make sure create a migration with these fields
 *
 * 1- iso
 * 2- name
 * 3- nicename
 * 4- iso3 (This should be nullable)
 * 5- numcode (This should be nullable)
 * 6- phonecode
 *
 *
 */


namespace Database\Seeders;

use App\Models\Country;
use Illuminate\Database\Seeder;
use Illuminate\Support\Facades\Http;

class CountryTableSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        try{
            $countries = Http::retry(3, 100)->get("https://gist.githubusercontent.com/MuhammadSaim/41ebdc2f44fbc0625de4d73a372ce843/raw/c343fd2a81356cbab4c46ef6646332c3e91675f7/countries.json");
            $countries = $countries->json();
            foreach ($countries as $country){
                Country::create([
                    'iso' => $country['iso'],
                    'name' => $country['name'],
                    'nicename' => $country['nicename'],
                    'iso3' => $country['iso3'],
                    'numcode' => $country['numcode'],
                    'phonecode' => $country['phonecode'],
                ]);
            }
        }catch (\Exception $e){
            throw new \Exception($e->getMessage());
        }
    }
}