Is the questioner's abandonment of following up on her engagement and leaving the matter to others, without seeking to understand the reason from the suitor, considered a shortcoming on her part in taking the means of endeavor that God has commanded, or does that fall under God's predestination and decree?

The Messenger, peace and blessings be upon him, said: "Everything is by divine decree, even helplessness and shrewdness." This means that Allah decreed the helplessness of the helpless and the shrewdness of the shrewd, and He wrote the destinies of creatures fifty thousand years before He created the heavens and the earth.

It is necessary to believe that what happened is by Allah's decree, and that no one can prevent a person from receiving the good that Allah has decreed for them, or ward off a harm that Allah has decreed upon them.

Therefore, the woman should relieve herself of "if only" and "perhaps," and know that what happened was destined. If she can take permissible measures to convey her agreement to the marriage, then she should do so, while being mindful that the choice of a husband should not be based on wealth. Rather, a righteous husband should be chosen.