LiteSpeed - register WordPress menu as ESI block

functions.php

<?php

add_action( 'init', function() {
    if ( method_exists( 'LiteSpeed_Cache_API', 'esi_enabled' ) && LiteSpeed_Cache_API::esi_enabled() ) {
        LiteSpeed_Cache_API::hook_tpl_not_esi( function () {
            add_filter( 'wp_nav_menu', function( $nav_menu_html, $args ) {
                if ( $args->menu_id == "menu-id-to-replace" ) {
                    return LiteSpeed_Cache_API::esi_url( 'my_custom_menu_esi_hook', 'My Menu to Use with ESI' );
                }
                return $nav_menu_html;
            }, 10, 2 );
        } ) ;
        LiteSpeed_Cache_API::hook_tpl_esi( 'my_custom_menu_esi_hook', function ( ) {
            wp_nav_menu( array(
                'menu_id' => 'menu-id-to-replace'
            ) );
        }) ;
    }
} );