Keep in mind it’s always hard to compare SoT between the devices of different people:
While they all use a Phone (3), the whole environment can differ radically:
- Quality of cellular signals
- Quality of wifi signals
- Installed apps, services and accounts
- The actual apps used while the screen is active
- Screen brightness
- Dark mode vs. light mode
All of these points can have a (significant) impact on battery performance and thus screen on time results.
I can still say, now after more than 48 hours and two charges since installing Nothing OS 4.0 stable, the update improved my (idle) battery performance almost significantly.