Is supplicating for abundant sustenance beyond measure and for the opening of closed doors, while striving to acquire sustenance but the doors appear to be closed, a valid supplication that should be adhered to, or is it incorrect?

Allah holds the treasures of all things in His hands. Therefore, the supplicant should be patient in their supplication, seek out times of responsiveness, and avoid hindrances to it. In the Hadith: "The supplication of one of you will be answered as long as he does not become impatient, saying: 'I supplicated but was not answered.'" And supplication is not in vain, for the Prophet (peace and blessings be upon him) said: "There is no Muslim who supplicates with a supplication in which there is no sin or cutting off of kinship, but Allah will give him one of three things: either He will hasten his supplication for him, or He will store it for him in the Hereafter, or He will avert from him an evil equal to it." And Allah is most responsive, most generous, and most rewarding; His treasures are inexhaustible, and His bounties never cease. Therefore, one must continue to supplicate and not hasten the answer, for nothing is too great for Allah, and a servant may ask Him for whatever they wish from the good of this world and the Hereafter.