She might notice that you're no longer viewing her stories and feel a bit disappointed or curious about why. But if you two aren't that close, it may not matter much to her.
Perhaps there was something in her stories that made you uncomfortable. It could be her attitude in the stories, or the topics she was constantly talking about that you didn't like.
You could start by making your stories more interesting. Add some humor, unique perspectives, or new elements. For example, if you usually post pictures, try adding short videos or captions with interesting stories behind the pictures.
If you still care about their opinion, you might consider reaching out privately in a very casual way. Just ask how they're doing and mention that you noticed they stopped watching your stories. But be prepared for any kind of response, positive or negative. However, this is a bit risky as it could reopen old wounds or create new drama.
Perhaps there was something in one of your stories that made him/her uncomfortable. It could be a topic, an opinion or even just the way you presented it. So he/she decided to stop watching.
Perhaps they are simply tired of the type of stories they were previously watching. It might also be a sign that they are moving on in their life and don't want to be involved in the passive consumption of stories that might be related to people or topics they no longer care about. For example, if those stories were from mutual friends, they may be cutting off that aspect of their past life.