If you would like to change how reviews are sorted on WooCommerce product pages, it is possible to do so using the standard WordPress functionality.

Go to Settings -> Discussion menu (in the standard WordPress menu) and find options “Break comments into pages with X top level comments per page and the last/first page displayed by default” and “Comments should be displayed with the older/newer comments at the top of each page”. You can control how reviews are sorted and displayed on product pages by modifying these options.