The request was to extend the edict enabling the Jews to defend themselves to a second day. Purim is celebrated as a two day feast. The two commentaries I checked state that the other part of the request was to hang the dead bodies of Haman’s sons. This was intended to intimidate remaining Jewish enemies.
The interpretation of this article seems strained.
Re: “The interpretation of this article seems strained.”
Totally agree. There is no indication in the text that the passage has a dual prophetic meaning. This is a narrative passage giving further information in the account of the Jews being allowed to continue to defend themselves for a second day. There is no reason to read into the hanging of Haman’s sons as anything more than what it was - defending their lives against their existing deadly enemies - Haman and his family.
In addition to that, the very sizes, shapes, crowns, numerical values, and even the names of the letters are loaded with meaning. Chr*stianity's concept of "inspiration" pales by comparison.