Apple

I recently had some information leaked that no one new about. Is it possible to get into someone’s phone without them knowing about it? Like, mirroring I guess? Enabling to see text messages, calls, photos, etc? I think someone gotten into my phone without really ever being around them. Had some very specific information leaked out that I don’t know how bc no one knew about but me.

Thoughts? Suggestions on how to find out?

Thanks.