Use content-product.php template for Woocommerce product block

wc-block-product.php

// Source: https://github.com/woocommerce/woocommerce-gutenberg-products-block/issues/891#issuecomment-568752116
// =========================================

function _wc_get_template_part_str($template_name, $part_name=null) {
    ob_start();
    wc_get_template_part($template_name, $part_name);
    $var = ob_get_contents();
    ob_end_clean();
    return $var;
}

function woo_block_product_grid_item_html($html, $block_attr, $_product) {
    global $product, $post;

    $is_woo_block_product_grid_item = true;
    $orig_product = $product;
    $orig_post    = $post;

    $product = $_product;
    $post    = get_post(  $_product->get_id()  );
    $html    = _wc_get_template_part_str( 'content', 'product' );
    $product = $orig_product;
    $post    = $orig_post;

    return $html;
}
add_filter( 'woocommerce_blocks_product_grid_item_html', __NAMESPACE__ . '\\woo_block_product_grid_item_html', 10, 3);