What is meant by the statement that the prescribed act is supplication (du‘a’) in general in the case mentioned in fatwa no. 2749673, and not specifically istikhara, and does this mean the permissibility of supplicating for what one desires and awaiting the answer?

Supplication (Du'a) is a Muslim's asking Allah for their needs, such as requesting a righteous spouse. Istikhara, on the other hand, is a specific type of supplication performed after praying two rak'ahs, concerning a permissible matter where the Muslim does not know the correct course of action. Its purpose is to entrust the matter to Allah so that He may choose what is best. It is permissible for a woman to perform Istikhara if a suitor proposes to her, and it is legislated for her to supplicate, asking for good in this world and the Hereafter. Allah has commanded supplication and promised to answer it, and whoever does not ask Allah incurs His wrath. The etiquette of supplication, such as certainty, presence of heart, and not rushing the answer, must be observed.