This article explains how to delete Screen Time data from iPhone.
Delete/Clear/Reset Screen Time Data or Reports on iPhone, iPad
Screen Time is a built-in feature on iOS devices, and you can’t remove it completely. You can only remove data associated with Screen Time if you turn it off. If you turn off Screen Time, the time associated with each app will no longer be recorded.
To turn off Screen Time, follow these steps:
Open the Settings app on your iPhone.
