The reason for the delay in the response to supplication

Question:
He says: Honorable Shaykh, regarding the virtue of supplication and the importance of supplication, but what is the cause of supplication not being answered?

Answer:
Supplication is the greatest of the types of worship, as the Messenger (peace and blessings be upon him) said: It is the greatest of the types of worship. The Muslim supplicates to Allah (Mighty and Majestic) and does not despair or lose hope. Even if the response is delayed, the delay in the response may be better for him than the hastening of the response. Or he supplicates and leaves the matter to Allah (Glorified and Exalted is He). Yes.

The presenter:
May Allah reward you, Honorable Shaykh