1. Unfinished emotions: It is possible that your ex still has some kind of emotion towards you, whether it is attachment, reluctance, or curiosity, which drives him to continue paying attention to your updates and hoping to understand your current situation.
2. Habit driven: During a relationship, both parties often pay attention to each other's dynamics, forming a habit. Even after breaking up, this habit may be difficult to change temporarily, causing the ex to unconsciously continue checking your updates.
3. Seeking psychological balance: Sometimes, people evaluate their post breakup life status by observing their ex partner's life, in order to seek a psychological balance. The ex may want to confirm through your updates whether they made the right decision or missed something.