Use this condition if you wanna do anything only on static home page

codestar-example.php

<?php
function op_register_metaboxes( $options ) {
    $options = array();
    
    if ( 'page' === get_option( 'show_on_front' )
        && ( $page_id = get_option( 'page_on_front' ) )
		&& isset( $_GET['post'] )
		&& $_GET['post'] === $page_id ) {
        
        $options[]    = array(
          'id'        => 'op_home_page_only_metabox',
          'title'     => 'Page Settings',
          'post_type' => 'page',
          'context'   => 'normal',
          'priority'  => 'high',
          'sections'  => array(
              // Sections config goes here
           ),
        )
    }
    
    return $options;
}
add_filter( 'cs_metabox_options', 'op_register_metaboxes' );

wp-static-home-page-cond.php

<?php
if ( 'page' === get_option( 'show_on_front' )
    && ( $page_id = get_option( 'page_on_front' ) )
    && isset( $_GET['post'] )
    && $_GET['post'] === $page_id ) {
    // do your stuffs here
}