Running with the phone in an armband, sweat and rubbing pause the music and skip the track. One tap on the tile in the quick settings — like Wi-Fi — and the screen stops responding to touches. The volume keys keep working.
Android places the window of every ordinary app below them, on purpose. All the rest of the screen is blocked; those two areas are your way out.
The only way to cover them would be an accessibility service, and Google Play reserves that for tools for people with disabilities. This is not one, so it does not pretend to be. The notification keeps its Unlock button behind a confirmation for the same reason: the shade is reachable, so a stray touch there must not be enough.
The lockscreen is the other place the lock cannot reach: there the system hides it, and no ordinary app can change that. So the app keeps you from getting there. While the lock is on, the screen does not turn off at the system timeout, unless you ask it to in the settings.
Measured on the Android emulator (API 34), a Pixel 10 Pro (Android 17) and a Galaxy A15 (One UI 6). Every number above, and how it was taken, is written down in the project's notes.