How to render a block provided by a contrib module in a node template
Go for Twig Tweak.


  Twig Tweak is a small module which provides a Twig extension with some
  useful functions and filters that can improve development experience.


Then it's just

{{ drupal_block('better_social_sharing_buttons_block') }}


Read the docs about Rendering blocks with Twig Tweak.


  This subject is rather confusing because too many things in Drupal are
  referred to as "Blocks". So it is essential to understand what kind of
  block you are going to render. This guide covers three main cases you
  may deal when rendering blocks in a Twig template.