There could also be a technical issue. Maybe there's a problem with her device or the app. Sometimes glitches prevent notifications from showing up properly, so she might not even be aware that you've posted new stories.
If you don't want her to watch all your stories, then you might be a bit worried. But if you're okay with it, it's no big deal. It really depends on your relationship with her and how you feel about her having that much access to your updates.
Perhaps she had some personal issues or distractions that prevented her from giving your stories the attention they deserve. It might not have anything to do with you or your stories specifically.
It could be that she enjoys your perspective and the content you put out. Or perhaps she's simply curious about your life and what you're up to through your stories.
Another option is to directly ask her if she's been missing your stories and if there's a reason she's not watching them. This way, you can get to the bottom of the issue and maybe she'll be more inclined to check them out in the future.