It might help to disable "Allow Multiple Apps" and "Picture in Picture" on her iPad. This also disables slide over. Also consider disabling gestures.
iOS 17 offers to disable all of this stuff on initial install if you set up a child account, because kids tend to get confused, especially by slide over. But they should probably offer that sort of thing as an "easy mode" option for all users.
iOS 17 offers to disable all of this stuff on initial install if you set up a child account, because kids tend to get confused, especially by slide over. But they should probably offer that sort of thing as an "easy mode" option for all users.