Is it true that some believers' standing on the Day of Resurrection will only last approximately the duration between Dhuhr and Asr prayers?

The short duration of the believers' standing on the Day of Judgment has been confirmed. Abu Ya'la narrated with an authentic chain from the Prophet (peace and blessings be upon him) that he said: "The Day when mankind will stand before the Lord of the worlds, for half a day, which is fifty thousand years. This will be made easy for the believer, like the sun descending for sunset until it sets." This was authenticated by Al-Haythami and Al-Albani.

Imam Ahmad, Abu Ya'la, and Ibn Hibban narrated from Abu Sa'id al-Khudri that the Messenger of Allah (peace and blessings be upon him) said concerning the Day of Resurrection: "By Him in Whose Hand is my soul, it will be lightened for the believer until it is lighter for him than a prescribed prayer." Ibn Hajar graded its chain of narration as hasan (good), while Al-Albani and Al-Arna'oot graded it as da'if (weak).

As for specifying the duration between Dhuhr and Asr, no such mention has been reported.