How to load new strings from new woocommerce functions

Hi,

I added a function to my child theme’s functions.php file that contains a string that I would like to be able to translate into other languages, e.g.

$sortby[‘num_reviews’] = __(‘Sort by number of reviews’, ‘woocommerce’ );

I thought that ‘Sort by number of reviews’ would show up in the Woocommerce translations in Loco Translate but it doesn’t.

Or do I need to replace the Woocommerce text domain by my child them text domain?

Could you please let me know what I’m missing?

Thanks!