Ok I found a solution.
While editing the page with sections, use the instructions listed here (2nd item): https://wordpress.org/plugins/social-media-feather/faq/
If you don’t see a “Custom Fields” metabox, click the “Screen Options” tab at the top right and make sure “Custom Fields” is checked.
Now click “Enter New” and add this key: synved_social_exclude_share
With a value of: yes
Then click “Add Custom Field”.
Now in the section of your choice where you want the icons to show up, add the shortcode: [feather_share]