That was my experience

I used to have another phone that my daughter played with a lot, watching videos, playing games, etc., normal things. But one night while I was sleeping, she took the phone and installed a somewhat suspicious app. When I woke up, my daughter was asleep and the phone was lying face down on the floor. When I picked it up and turned it on, there was a black screen with a red warning ⚠️ symbol. I didn't pay much attention because my daughter likes to play pranks, but a week later my phone was hacked or whatever the correct term is, and when I turned it on, none of my apps were there, only others that neither I nor my daughter had installed.