The Sunnah is to hasten the iftar after confirming the sunset. If the fasting person intentionally delays iftar due to his/her belief that it is more virtuous, then that is disliked.
Sunnah acts of fasting continued:
Making authentic duaa from the Sunnah after iftar:
“The Prophet pbuh used to say when he broke his fast, “Oh, Allah, for You I have fasted, and with Your provision I have broken my fast, and I have placed my trust in You, and in You I have believed; thirst has gone, the arteries are moist, and the reward is certain, if Allah wills.”