Hello,
Thanks for using our theme.
I can see only 1 product on your shop page, so add more products.
About “Filter Products by Attribute” widgets, make sure that your products have these attributes, for example – https://prnt.sc/xa6xlm https://prnt.sc/xa6w6l https://prnt.sc/xa6uqp
About /index.php/ in URL of your Shop page, read this topic –
https://www.8theme.com/topic/index-php-url/
Regards