Get all categories with additional fields in woocommerce

functions.php

<?php
function wc_get_categories() {
    $all_categories = get_categories(array(
        'taxonomy' => 'product_cat'
    ));

    foreach ($all_categories as &$cat) {
        $thumbnail_id = get_woocommerce_term_meta( $cat->term_id, 'thumbnail_id', true );
        $cat->thumbnail_image = wp_get_attachment_url( $thumbnail_id );
        $cat->link = get_term_link( $cat->slug, 'product_cat' );
    }

    return $all_categories;
    
    // return this instead if you want to return only root categories
    // return array_map($all_categories, function($cat) {
    //     return $cat->parent == 0;
    // });
}