Metaboxes not visible on Settings page

I followed the instructions to create the page but my understanding, from that page and what you're saying, is that I cannot create metaboxes and apply to that page, like I would a regular site page, but that I'd have to generate the fields and metaboxes code and put it within the functions.php or the plugin file. Is that correct?

Well, I mean adding custom fields to a specific page, post, or template, that can be filled out. I've tried creating a settings page as part of functions.php and a plugin file. The pages are created with that code, but when I cannot get the custom fields to appear even when building them within the Meta Box Builder.

My understanding (and hope) was that I could create the fields with the builder, apply them to the settings page, and those fields show on that setting page when I go there. That's not what happens – the page is there but the meta boxes/custom fields are not. Hence my confusion.

Is that what I should expect to happen? Without adding the fields codes to the plugin or functions.php?

I did, and it still didn't show up there. I also checked the generated code for the fields and instead of showing the settings page ID, is showed an empty array.

This is what I see...

add_filter( 'rwmb_meta_boxes', 'your_prefix_register_meta_boxes' );
function your_prefix_register_meta_boxes( $meta_boxes ) {
    $meta_boxes[] = array (
        'title' => 'Test Settings Fields',
        'id' => 'test-settings-fields',
        'fields' => array(
            
            array (
                'id' => 'text_1',
                'type' => 'text',
                'name' => 'Text Field',
            ),
        ),
        'settings_pages' => array(
        ),
    );
    return $meta_boxes;
}

I ran the update from the WordPress updates for Meta Box AIO, but the change didn't make a difference. Do I need to change the code for the settings page?