Woocommerce product feed manager snippet so the Shortcoder plugin is supported (https://wordpress.org/plugins/shortcoder/)

shortcoder support

function wppfm_shortcoder_support( $attributes, $feed_id, $product_id ) {

	if ( has_custom_field( $attributes['description'] ) ) {
		$description = $attributes['description'];

		$attr = [ 'name' => get_shortcode_name_from_description( $description ) ];

		//parse shortcodes do_shortcode
		$attributes['description'] = process_product_shortcode( $attr, $description, $product_id );
	}

// IMPORTANT! Always return the $attributes
	return $attributes;
}

add_filter( 'wppfm_feed_item_value', 'wppfm_shortcoder_support', 10, 3 );

function has_custom_field( $description ) {
	if ( ! is_plugin_active( 'shortcoder/shortcoder.php' ) ) {
		return false;
	}

	$shortcode_pattern = '@\[([^<>&/\[\]\x00-\x20=]++)@';

	preg_match_all($shortcode_pattern, $description, $has_custom_field );

	return !empty( $has_custom_field[0] );
}

function get_shortcode_name_from_description( $description ) {

	if ( has_custom_field( $description ) ) {
		$offset = stripos( $description, '[sc name="' ) + 10;
		$length = stripos( $description, '"sc]', $offset ) - 7;

		return substr( $description, $offset, $length );
	} else {
		return null;
	}
}

function process_product_shortcode( $atts, $description, $product_id ) {

	if ( ! has_custom_field( $description ) ) {
		return $description;
	}

	$shortcoder = new Shortcoder();

	$atts = (array) $atts;
	$shortcodes = $shortcoder::get_shortcodes(); // Gets the available shortcodes defined in the Shortcoder plugin and put them in an array

	if( empty( $shortcodes ) ){
		return '<!-- No shortcodes are defined -->';
	}

	$shortcode = $shortcoder::find_shortcode( $atts, $shortcodes ); // Gets one of the available short codes, selected by the $atts variable

	$shortcode = apply_filters( 'sc_mod_shortcode', $shortcode, $atts, $description );

	if( !is_array( $shortcode ) ){
		return $shortcode;
	}

	$sc_content = $shortcode[ 'content' ];

	$sc_content = replace_custom_fields( $sc_content, $product_id ); // Fills in the custom fields in the shortcode content

	return preg_replace( '(\[sc.*?\/sc\])', $sc_content, $description); // Replace the shortcode in the description and return the result
}

function replace_custom_fields( $content, $product_id ){

	$product = wc_get_product( $product_id );

	preg_match_all('/\$\$[^\s^$]+\$\$/', $content, $matches );

	$cf_tags = $matches[0];

	if( empty( $cf_tags ) ){
		return $content;
	}

	foreach( $cf_tags as $tag ){

		if( strpos( $tag, 'custom_field:' ) === false ){
			continue;
		}

		preg_match( '/:[^\s\$]+/', $tag, $match );

		if( empty( $match ) ){
			continue;
		}

		$match = substr( $match[0], 1 );
		$value = $product->get_meta($match);
		$content = str_replace( $tag, $value, $content );
	}

	return $content;
}