I hope you are well today and thank you for your question.
I visited your shares site and it seems you have not added correct URLs in the social icons menu therefore it is not displaying on your site.
To create social icons follow the below steps :
Create a menu like any other menu in the admin area of your site under Appearance -> Menus .
Use the correct urls in the menu items, so for twitter it must be twitter.com for facebook it must be facebook.com. Otherwise URLs won’t get recognized and you will get squares without icons.