I am just using plain old Gutenberg with the latest Astra theme. I changed to Twenty Twenty and same issue appears. I deactivated all 3 plugins (just Bluehost and Grow Social left activated).
The sharing buttons don’t show up on the Posts page as set from Settings –> Reading. They appear on every other page and post, even the homepage.
HOMEPAGE
https://drive.google.com/file/d/1jnK0aXHx4w_95HLSFTen8Fc8JhIv_JS8/view?usp=sharing
POSTS PAGE
https://drive.google.com/file/d/1-NENKAzj6HEXUYvAn5guFDJeQNzYAnpy/view?usp=sharing
The blog page has been set through Settings –> Reading
