Generally, people can't tell if you rewatch their snap story. The app doesn't have a built-in feature to notify the original poster about rewatches. But keep in mind that technology can change, and new features might be added in the future.
In most cases, no. Usually, there's no direct notification that shows someone has rewatched your snap story.
Most likely not. Snap stories don't have a function to notify the creator when someone rewatches. However, it's always possible that Snapchat could introduce such a feature in the future or that there could be some third-party apps or hacks out there, but those aren't official or reliable.
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