fph if you intend to use your device in network environment which you almost certainly do, your activity will be tracked browsing across the web or using native apps and can be inadvertedly used using various hardware, non-hardware and device performance identifiers to correlate and link to any previous activity.
Collection of certain identifiers is prevented on GrapheneOS but as dev team commented in one of their posts (which I can't locate atm), any app (or online service) can create their own set of identifiers they can use to track you and collection of which OS can do nothing about.