Dates can be a ranking factor, as a really old post on a topic may not be as relevant as a newer post. But thats just one of many factors.
If the date becomes a ranking factor, then most users adopt the:
1. update old posts
2. display only the latest date on the front end, which in default GP templates can be done by adding the PHP Snippet provided here:
https://docs.generatepress.com/article/generate_post_date_show_updated_only/
If you’re using other methods of displaying posts or using a GP Block Element Content Template, then instead of the filter you would need to edit those blocks / elements that are displaying the dates and change their dynamic data type to the latest date.