Settings page not showing in top level, only as submenu

We created a settings page via code (not UI controls). The settings page does show in the admin UI as expected. However, it doesn't show in the Metabox settings page list. Is there a way to have it appear there as well?

Thanks. I just tried and it didn't make the page appear. https://share.getcloudapp.com/kpu75lAR

<?php
add_filter( 'mb_settings_pages', 'your_prefix_function_name' );

function your_prefix_function_name( $settings_pages ) {
    $settings_pages[] = [
        'menu_title'    => __( 'Pencil 2', 'your-text-domain' ),
        'id'            => 'pencil-2',
        'option_name'   => 'Pencil2',
        'position'      => 90,
        'submenu_title' => 'test',
        'parent'        => 'options-general.php',
        'columns'       => 1,
        'help_tabs'     => __( 'Here is help content - where does it show up?', 'your-text-domain' ),
        'customizer'    => true,
        'icon_url'      => 'editor-paste-text',
    ];

return $settings_pages;

}

We created several test settings pages

Pencil5 - shows on wp admin - not on customizer
Well it does but only for a second, then disappears. I see CSS is set to display none.
I created it purely through code (not through admin UI).
https://inspiration.homecarestaged.wpengine.com/wp-admin/admin.php?page=edit-snippet&id=9
Now we have to figure out why it disappears.

Pencil2 - appears in customizer but not wpadmin
It was created through the UI
https://inspiration.homecarestaged.wpengine.com/wp-admin/post.php?post=554&action=edit

What I want is for one of them to show up on both customizer and wpadmin
Hmmm... now that I write this I wonder if this is even possible. Maybe it is one or the other?

Ok I found that pencil2 is showing in wpadmin under "settings" even though we have it set to be top level under "SEO" item. So it seems the "menu type" setting on metabox is being ignored.

Mystery solved for pencil5
We were inserting the code via "snippets" plugin. Plugin was set to run snippet only on admin. When revising this to run everywhere pencil5 now shows in both the customizer and wpadmin.

Pencile2 was not created through snippets plugin so the question about pencil2 still remains.