It depends on your current state of mind and your relationship with your ex. If you're in a new relationship, it might be a bit concerning as it could potentially cause some jealousy or insecurity. But generally, it's just their way of staying updated about you, and it doesn't always imply something negative. If it bothers you, you can block them or limit their access to your stories.
It depends on the nature of your past relationship and your ex's personality. If they were a bit controlling in the past, then it could be a sign that they are still trying to have some sort of influence. But if it was a relatively normal breakup, it could just be their way of staying casually informed about an old acquaintance.
This could indicate a few things. Firstly, they might be struggling to let go completely. They may be holding on to the memories and by watching your stories, they feel a bit closer to that part of their life. Secondly, it could be a form of passive communication. They're not ready to reach out directly but still want to be involved in your life in some small way. And lastly, it might just be a matter of boredom or nosiness. They have nothing better to do and seeing your stories gives them something to look at. However, without communicating with them, it's hard to know for sure.
Not necessarily. If it makes you uncomfortable, you can always limit their access. But it might just be a harmless thing on their part, like casual curiosity.
It could mean a lot of things. Maybe they're still curious about your life. Or perhaps they miss you on some level and this is their way of staying connected without actually reaching out.