$builder->insert($data); not work

Hi all,
I have a problem with a insert in a database.

This is the controller:

PHP Code:

......

$AmministrazionenModel = new AmministrazioneModel();

$data = [
        'usato'         => $myObject["usato"],
        'nome'          => $myObject["nome"],
        'descrizione'   => $myObject["desc"],
        'targa'         => $myObject["targa"],
        'telaio'        => $myObject["telaio"],
        'km'            => $myObject["km"],
        'id_veicoli_cat'=> $myObject["veicoli_cat"],
        'id_zona'       =>  ($session->id_concessionaria),
        'venduto'       => 0
      ];

$res = $AmministrazionenModel->insert_auto($data);
...... 


This is model:

PHP Code:

  public function insert_auto($data)
  {
       $db      = \Config\Database::connect();
       $builder = $db->table("veicoli");
       $builder->insert($data);
       print $builder->getCompiledSelect();
  } 


The query printed is "SELECT * FROM `veicoli`"
instead of
"INSERT INTO veicoli ....."

Why ?
Can you help me ?
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Edit:
Codeigniter 4.0.4