Iconic LV (linked variation) show out of stock products

functions.php

<?php 
// Iconic Linked variation: Custom snippet to mark products as in stock if they're not currently in stock
add_action( 'woocommerce_single_product_summary', 'iconic_lv_add_force_instock_filter', 24 );

function iconic_lv_add_force_instock_filter() {
    add_filter( 'woocommerce_product_get_stock_status', 'iconic_lv_force_product_instock_filter', 10, 2 );
}

function iconic_lv_force_product_instock_filter( $stock_status, $product ) {
    // Force the product to be in stock regardless of current status
    return 'instock';
}

function iconic_lv_force_product_purchasable( $purchasable, $product ) {
    return true;
}

// Remove the filter at priority 11
add_action( 'woocommerce_single_product_summary', 'iconic_lv_remove_force_instock_filter', 26 );

function iconic_lv_remove_force_instock_filter() {
    remove_filter( 'woocommerce_product_get_stock_status', 'iconic_lv_force_product_instock_filter', 10 );
}