Multisite settings page only working for the default site

I added a simple settings page according to this in my custom plugin:

$plugin_admin_options = new Vendor_Admin_Options();
$this->loader->add_filter('mb_settings_pages', $plugin_admin_options, 'addOptionsPage', 1);
$this->loader->add_filter('rwmb_meta_boxes', $plugin_admin_options, 'addOptions');

class Vendor_Admin_Options
{
    /**
     * @param $settings_pages
     * @return array
     */
    public function addOptionsPage($settings_pages)
    {
        $settings_pages[] = array(
            'id'          => 'vendor',
            'option_name' => 'vendor',
            'menu_title'  => 'VENDOR',
            'icon_url'    => 'dashicons-admin-settings',
            'page_title'  => 'Vendor Settings',
            'style'       => 'no-boxes',
            'columns'     => 1,
            'parent'      => 'options-general.php',
            'tabs'        => array(
                'general' => __('Data', 'vendor'),
                'design'  => __('Colors', 'vendor'),
            ),
            'position'    => -10,
            'help_tabs' => array(
                array(
                    'title'   => 'Data',
                    'content' => '<p>Content</p>',
                ),
            ),

        );

        return $settings_pages;
    }
...
}

But the addOptionsPage function only executes on the default network site, not on the other sites. What could be the problem?

I checked the execution, addOptionsPage only on the default site, but addOptions is executed on the other sites aswell.