Hello, @afaqshakoor,
1. To solve your issue, first, you have to enable the social share from the Dashboard >> XSTORE >> Theme Options >> WooCommerce >> Single Product Page >> Single Product Layout check this image: https://postimg.cc/vDrDTHTm
Navigate to the Dashboard >> XSTORE >> Theme Option >> Social Share there you will see all the icons our theme has, just check the ones you want. Check the image: https://postimg.cc/TK95jkf2
You can not set the links for them as those social icons are for sharing purposes and generate the link which shares the particular product on that social forum.
2. The Review tab is showing fine on the single product page: https://postimg.cc/HjBXBty0
I have just rate the product and here is the result: https://postimg.cc/YGjGP5g1
Regards 8Themes Team.