Codeigniter4 Routing Failing - php

Question

I have a problem with routing on my website as it's not working at all. At the beginning I wanted to have different Controllers for differetn tabs, but in the end I have changed that to view pages from the Home controller, but even that doesnt work.
Here is my Home controller - index and connection to Model works fine but the travel() function doesnt
<?php
namespace App\Controllers;
use App\Models\HomeMod;
use \Codeigniter\Controller;
class Home extends BaseController {
public function index() {
$this->homeMod = new HomeMod();
$data = array();
$data['total'] = number_format($this->totalCases('total'));
echo view('header');
echo view('welcome_message', $data);
echo view('footer');
}
protected function totalCases(String $columnName) : String{
$result = $this->homeMod->findColumn($columnName);
return count($result) > 0 ? $result[0] : "0";
}
public function travel() {
return view('travel');
}
public function getPostCodeCases() {
if(!IS_AJAX) return;
var_dump("inside");
die();
}
}
I cannot reach the getPostCodeCases() function either (the ajax call in js file works fine, its just not reaching this function).
And my routes file - as you can see i have tries with different variations
$routes->get('/', 'Home::index');
// $routes->get('/getPostCodeCases', 'Home::getPostCodeCases');
$routes->post('/getPostCodeCases', 'Home::getPostCodeCases');
$routes->match(['get', 'post'],'/getPostCodeCases', 'Home::getPostCodeCases');
$routes->get("travel", "Travel::index");
// $routes->add('/travel', 'Travel::index');
// $routes->add('travel', 'Home::travel');
// $routes->add('/travel/(:any)', 'Travel::index');
My base url: https://localhost/CI and $indexPage = '' (in App.php).
I am sure I have missed something, somewhere but not sure where...
Could someone help me to resolve this problem ?