Model files in CI4

Thanks for reply,
but I can't figure it out.
Example:
I have a DB table named AA_Tabella1.

My Entity file is Entities/E_Comuni.php:
<?php
namespace App\Entities;
use CodeIgniter\Entity\Entity;
class AA_Tabella1 extends Entity
{}

My model file is Models/M_Comuni.php:
<?php
namespace App\Models;
use CodeIgniter\Model;
class AA_Tabella1Model extends Model
{
protected $table = 'AA_Tabella1';
protected $returnType = 'App\Entities\AA_Tabella1';
protected $allowedFields = [];
public function Leggi($Lingua = 0)
{
if ($Lingua === 0)
{
$TabOut = $this->asObject()
->findAll();
}
else
{
$TabOut = $this->asObject()
->where(['Lingua' => $Lingua])
->first();
}
return $TabOut;
}
}

My Controller file is Controllers/Prova1:
<?php
namespace App\Controllers;
use CodeIgniter\Controller;
use App\Models\M_Comuni;
class Prova1 extends BaseController
{
public function index($Lingua = 'en')
{
$modello = new \App\Models\M_Comuni\AA_Tabella1Model();
$ListaLingue = $modello->Leggi();
$Dati['Lingua'] = $Lingua;
$Dati['ListaLingue'] = $ListaLingue;
echo view('pagprova2', $Dati);
}
}

The error I got is:
"Class 'App\Models\M_Comuni\AA_Tabella1Model' not found"

What is wrong?