Done. Thank you anyway 🙂
Here goes the correct code for who might be interested:
function bbp_enable_visual_editor( $args = array() ) {
$args['tinymce'] = true;
$args['teeny'] = false;
$args['tinymce'] = array(
'toolbar1' =>'bold, italic, blockquote',
);
return $args;
}
add_filter( 'bbp_after_get_the_content_parse_args', 'bbp_enable_visual_editor' );