Hello,
There isn't a hook to move the Favorite Posts settings page to another menu. I use this code to remove the default settings page
add_action( 'admin_init', function() {
	remove_submenu_page( 'options-general.php', 'mb-favorite-posts' );	
}, 999 );
and this code to re-register the settings page
add_filter( 'mb_settings_pages', function( $settings_pages ) {
	$settings_pages[] = [
		'id'          => 'mb-favorite-posts',
		'option_name' => 'mb_favorite_posts',
		'menu_title'  => __( 'Favorite Posts', 'mb-favorite-posts' ),
		'class'       => 'mbfp-settings',
		'style'       => 'no-boxes',
		'column'      => 1,
		'parent'      => 'tools.php', // change parent menu here
		'tabs'        => [
			'mbfp_general' => 'General',
			'mbfp_button'  => 'Button',
			'mbfp_icon'    => 'Icon',
		],
	];
	return $settings_pages;
}, 99 );
however, it doesn't work properly so I recommend using the default settings page.