To display product reviews on the homepage you need to paste given below code where you want to display on the homepage. And also click on  the button, To remove any review from the testimonial section click on . All reviews with the icon " ♥ " will be displayed in the Testimonial section.  

<div class="wc_testimonial_section"></div>

Please follow App admin -->Rivyo product review --> Reviews --> All review.

here you can see reviews on the home page too as "Testimonials".