Hello,

The Reviews functionality comes from WooCommerce, so to disable it you can use the same way as described in WooCommerce – https://take.ms/5KXqH

1. The reviews from that plugin work well on my side – https://take.ms/yJF2G8, clarify is the issue in duplicates or in the wrong work of the reviews from that plugin?

2. In general, yes, but some elements in Layouts can inherit the settings from Theme Settings, e.g. – https://take.ms/EzipN

Kind Regards