He mentioned this hadeeth to be a good hadeeth and also authenticated by Ibn Kathir rahimahullaah.

Is there any debate on this hadeeth or agreemement of scholars on its authenticity?

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The hadeeth is authentic.

Shaykh, I came across a hadeeth in the Fiqh us Seerah by Imam Ghazali where he quotes a hadeeth from Rasul Allaah sal allaahu alayhi was salam saying that “Do not curse Waraqah ibn Naufal for I dreamt of a garden or two for him”