Did Pharaoh's wizards believe in Moses and Allah?

Yes.

7:120 - 122

And the wizards fell down prostrate, Crying: We believe in the Lord of the Worlds, The Lord of Moses and Aaron.

No.

10:83

But none trusted Moses, save some scions of his people, (and they were) in fear of Pharaoh and their chiefs, that he would persecute them.

Few believed in Moses, among them were the wizards.

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