All posts including scheduled ones that were created while the AuthoredUp tool was active are visible in the calendar view. So you can see, edit, or reschedule them in Calendar.
Additionally, you can access your scheduled posts via the LinkedIn platform and AuthoredUp extension. Follow these steps:
Open AuthoredUp in blue mode.
Click on the Schedule button
Click on "View all scheduled posts"
You'll see all your scheduled posts in the modal. From there, you tap on three dots (1) to open the menu that will offer you to post now (2), reschedule post (3), edit post (4) or delete post (5).