And I am interested to do this for category pages. Example here:
https://cherish-humanity.org/category/comunismul-un-concept-anti-umanitate/psihologie-caracteristicile-comunismului/

I want to take out from the right sidebar, the articles that are already displayed on the left side of the page.

i will add an example. you can look at this post: https://cherish-humanity.org/razboiul-comunistilor-impotriva-familiei-partea-ii-feminismul-bolsevic/

In “ULTIMELE ARTICOLE” sidebar the current article is also shown. I don’t want it to be shown. I use tagdiv 8 to display this sidebar.

usually I would use this code for the wordpress recent posts widget, but I don’t know what action you have for this theme.

function be_exclude_current_post( $args ) {
if( is_singular() && !isset( $args[‘post__in’] ) )
$args[‘post__not_in’] = array( 1482 );
return $args;
}
add_filter( ‘widget_posts_args’, ‘be_exclude_current_post’);

I think FB has the ability to disable those buttons anywhere they like, its their code. I have some fb issues right now. many things got blocked of fb for me at the moment.