Calendar spam notifications

So basically I’m getting notification from my Calendar saying that my stuff has been exposed to everyone and everyone can see stuff about me and my data is like it’s leaking so I really don’t know what that means I keep getting more and more notifications to from it so if you can get back to me I appreciate it my name is Zanihia Rana I have the iPhone 8+ and it’s just saying that stuff so I’m not sure what it means if you guys can help me out I appreciate it thank you i’ve been getting the notification for like two weeks now but yeah.

[Re-Titled by Moderator]