Where listing owners edit their social profiles depends if you have your Social Profiles associated with user (Listing Owners) or if you have the Social Profiles associated to Listings.
Social Profiles Associated with user
Head over to WooCommerce > Settings. Then, make sure you have a URL added to the Edit Account end point. From there, your users will be able to edit their social media links when they visit this page.
Social Profiles Associated with Listings
If your social profiles are associated with listings, users can add them via the listing submission form and they can edit them by editing their listings.