You can manage them by editing them. The Edit topics button allows you to remove the topics you’ve added from your list by clicking on them to remove them from your feeds
You can change the view from Topic view to Time view: Topic view is the default view of all the topics you’ve added. It displays the latest four articles published within each of those topics. Time view is a reverse chronological view of your newsfeed with articles listed by date instead of by topic.
You can toggle between Time view and Topic view by clicking on the “Time” or “Topic” icon