pedi3/database/seeders/BarrioSeeder.php

<?php

namespace Database\Seeders;

use Illuminate\Support\Facades\Date;
use Illuminate\Support\Facades\DB;
use Illuminate\Database\Console\Seeds\WithoutModelEvents;
use Illuminate\Database\Seeder;
use App\Models\Region;
use App\Models\Barrio;

class BarrioSeeder extends Seeder
{
    /**
     * Run the database seeds.
     */
    public function run(): void
    {
        $prueba_id = Region::create([
            'nombre' => 'PRUEBA', 
        ])->id;

        Barrio::create([
            'nombre'=>'PRUEBA','region_id'=>$prueba_id, 'created_at'=>Date::now()
        ]);
    }
}