The passage ends the window at the break of dawn on 10 Dhu al-Hijjah, not at sunrise.
Someone reaching Arafat during the night before that dawn can attain the standing, provided the necessary ihram and location conditions hold. Arriving only after that dawn means missing the specified time. It is not an extension until sunrise.
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Book of Hajj: Omitted Arrival Tawaf, Arafat Standing and Women’s Rites
The passage ends the window at the break of dawn on 10 Dhu al-Hijjah, not at sunrise.
Someone reaching Arafat during the night before that dawn can attain the standing, provided the necessary ihram and location conditions hold. Arriving only after that dawn means missing the specified time. It is not an extension until sunrise.