Troubles with recovering and echo or printing $_GET

Question

So I'm having troubles with $_GET.

I cant seem to recover and echo or print the $_POST from my form in a different .php file (im using codeigniter4 btw). Can someone help? thank you

This is the code for "echoing" the $_GET in a different file (this is all inside an if statement with isset($_GET['variable'])

  $name = $_GET["name"];
  $email = $_GET["email"];
  $suggestions = $_GET["suggestions"];

  $output = "Name: " . $name . "\n";
  $output .= "Email: " . $email . "\n";
  $output .= "Suggestions: " . $suggestions;

  echo $output;

This is my controller code

$data = 
[
    'name',
    'email',
    'suggestions',
    'accept_terms'
];
       
    if($this->request->getMethod() == 'post')
    {
        $rules = 
        [
            'name'          => 'required',
            'email'         => 'required|valid_email',
            'suggestions'   => 'required',
            'accept_terms'  => 'required',         
        ];
        
        if($this->validate($rules))
        {
            return redirect()->to('/Savefeedback');
        }else 
        {
            $data['validation'] = $this->validator;
        }
        
    }   
    
    return view('Signup',$data);