1. How do I Manage Hide/Show Footer Social Icons
In WordPress Dashboard go to the Appearance submenu and click on Customize.
After clicking on customizing you will in theme Customizer.
Here you have to click on the Footer Section than Social Icon
In the Setting tab, you can hide and show the Social Icon by clicking on hide/show button.
Go to Customize -> Footer Section -> Social Icon -> Settings -> Hide/Show Section
2. How do I Manage Social Icon Content
In WordPress Dashboard go to Appearance submenu and click on Customize.
After clicking on customize you will in theme Customizer.
Here you have to click on Footer Section than Social Icon
In Content tab you will see a list of icons to add these icons you have to select icon from the dropdown list & here you can also add icon links.
Go to Customize -> Footer Section -> Social Icon -> Content -> Social Icon