change-breadcrumb-separator.php

/**
 * Change the breadcrumb separator.
 */
function wb_wc_change_breadcrumb_delimiter( $defaults ) {
	// Change the breadcrumb delimeter from '/' to '>'
	$defaults['delimiter'] = ' > ';
	return $defaults;
}
add_filter( 'woocommerce_breadcrumb_defaults', 'wb_wc_change_breadcrumb_delimiter' );