Hi Daniel,
Under the Multisite options panel you can choose which sites you want to display the results from: https://i.imgur.com/nTwHd7K.png
The results will be ordered by the sub-site order first, then by the choosen ordering. Please note that the current site has to have WooCommerce active to display product items from other sites as well.
Best,Ernest Marcinko
If you like my products, don't forget to rate them on codecanyon :)
