I don't think that this is possible in this plugin. We don't recommend to use meta numeric values at all. Range slider has very low performance. If you check all shops, like Amazon, they don't provide range sliders or ordering by custom fields values.

https://xforwoocommerce.com/

What do you use for product filters?

>https://rehubdocs.wpsoul.com/docs/rehub-theme/list-of-important-meta-fields/

I understand I can sort out using meta ranges or = or >... etc. But I can see an option to sort ascending and descending if the meta value is numeric. Is it possible?

1. Add ratings as user in rating tab and approve them

2. yes
https://rehubdocs.wpsoul.com/docs/rehub-theme/list-of-important-meta-fields/

1) How can I put manually the number of reviews on the product page? (eg. here: https://prmarketing.tools/product/surveymonkey-review-pricing-rating/). The site provides the aggregated rating from other online review sites so it would be nice to have the total number of reviews included somewhere on the page (instead of 0 reviews). How to do that?

2) Can I filter somehow products by review criteria. For example, if I had a "Ease of use" criteria for each product, could I use it to filter products by this criteria?

Kind regards,

Andrzej Sowula