using Analytics Data to prove my iPhone was accessed by someone else

Awhile back, I was able to look at the Analytics Data and see the Time Interval and Screen On Duration to confirm my phone had been accessed. Today I could see it had been taken out of the room, so I had another look, but I didnt see the same indicators as before. I saw some that might be useful, if they had Time Intervals.

But I heard there are apps that make it easier to look through and see what anpps were accessed at those times.. are they free?

I use FaceID during the day and turn it off for unlocking the phone at night to minimize the chance of anyone seeing my PIN. Once unlocked, I have Face ID set up to access pretty much everything, so even if someone got the PIN, they shouldn’t get far. Or is there some way they could access my phone without either?