OnePlus 12 Home Screen

I've got a parent who just got a OnePlus 12. I'm not familiar with OxygenOS since I have a Pixel so I'm looking for help.

The app icons on the home screen don't stay where you put them, they go up just like I remember on iPhone. Is there anyway to change that to leave them where you put them on the screen using the default launcher? I couldn't find where the setting is to turn it off and Google wasn't helpful.