Well, generally speaking, you are able to take screenshots of IG stories. It's a common feature. The person who posted the story won't get any official notification from Instagram saying that someone has screenshotted their story. This allows users to save content they like from stories without the worry of the creator being immediately aware.
Yes, you can take screenshots of IG stories. However, Instagram doesn't notify the user who posted the story that you've taken a screenshot. So in a sense, you can 'see' the screenshot you've taken privately, but the original poster has no way of knowing this directly from Instagram.
Yes, Instagram doesn't directly notify you when someone screenshots your story. However, there are some third - party apps that claim to be able to detect screenshots, but their reliability is often questionable and using them might violate Instagram's terms of service.
No, Instagram doesn't notify you when someone takes a screenshot of your story. So, there's no built - in way to directly see if someone has screenshot your IG story.