Envy Blog(Free Version) have 2 way to show social icons.
Method 1: Through widgets, After setting up social icons in customizer you need to set up a widget to the required location. In your WP dashboard go to Appearance -> Widgets, you will see 5 widgets area where you can drag and drop PT: Social Profiles Widget to display social icons.
Method 2: Social Icons can be enabled for Footer Bar.
– Go to WP Dashboard Appearance -> Customize
– Footer -> Footer Bar
There you can find disabled Social Icons section, CLick on Eye to make it visible.
Hope you got it and able to solve your issue.
Let me know if you have any other issues setting up your blog, I will be happy to help you out, Thanks.