bp_blogs_activity_comment_content_with_read_more( $content,  $activity )

function bp_blogs_activity_comment_content_with_read_more( $content, $activity ) {

	if( 'activity_comment' === $activity->type && $activity->item_id && $activity->item_id > 0 ) {
		// Get activity object.
		$comment_activity = new BP_Activity_Activity( $activity->item_id );
		if( 'blogs' === $comment_activity->component && isset( $comment_activity->secondary_item_id ) && 'new_blog_' . get_post_type( $comment_activity->secondary_item_id ) === $comment_activity->type ) {
			$comment_post_type = $comment_activity->secondary_item_id;
			$get_post_type     = get_post_type( $comment_post_type );
			$comment_id        = bp_activity_get_meta( $activity->id, 'bp_blogs_' . $get_post_type . '_comment_id', true );
			if( $comment_id ) {
				$comment = get_comment( $comment_id );
				$content = bp_create_excerpt( html_entity_decode( $comment->comment_content ) );
				if( false !== strrpos( $content, __( '…', 'buddyboss' ) ) ) {
					$content     = str_replace( ' […]', '…', $content );
					$append_text = apply_filters( 'bp_activity_excerpt_append_text', __( ' Read more', 'buddyboss' ) );
					$content     = sprintf( '%1$s<span class="activity-blog-post-link"><a href="%2$s" rel="nofollow">%3$s</a></span>', $content, get_comment_link( $comment_id ), $append_text );
				}
			}
		}
	}

	return $content;
}