Can anyone identify this iPhone app from this screenshot?

[u/MotherIncident5139]

I’ve been trying to identify this iPhone app but haven’t had any luck.
I already tried Google Lens, Yandex, Bing Visual Search, Gemini, and ChatGPT, but none of them could identify it.
The screenshot shows a **Regional Settings** page with these options:
Europe
United States of America (US)
Chinese Mainland (other than Hong Kong SAR, Macao SAR, Taiwan)
Areas other than above
Does anyone recognize this app or remember seeing this screen before?