Whether you have a personal or business account on Instagram, you can submit screenshots of your Instastory stats - even after 24 hours.
Click on the clock icon to view the archive of all your stories.
Click on any story, and you'll be able to see the number of views.
Impressions are only viewable from business accounts, through the Insights page.
If you don't already have Stories Insights turned on, you won't be able to see impressions on existing stories.
If you do have Stories Insights turned on, you will be able to see the views and impressions on each post.