Hi @zamotek,
The dots symbol is shown by default as part of excerpt content of post. To replace or remove it, you can simply add this function to your child theme’s main functions.
function sydney_child_replace_excerpt( $more ) {
return '';
}
add_filter( 'excerpt_more', 'sydney_child_replace_excerpt' );
If you don’t have a child theme, to add it directly from your site’s dashboard, you can use a custom JavaScript plugin. You can find it directly from plugins administration screen by visiting yoursite[dot]com/wp-admin/plugin-install.php?s=custom%2520javascript&tab=search&type=term
Here is the screenshot of mine for your reference: https://i.snipboard.io/jQEd4I.jpg.
Hope this reply helps.