How to make routes case insensitive

I've create API on CI4 and set all the routes then found out that all routes are case sensitive though I want to ignore case and match either way, how do I do it?

This should be routed with 
www.mydomain.com/api
www.mydomain.com/Api
$routes->group('api', function ($routes) {
    $routes->post('/', 'MyController::myFunction');
});