There is no official confirmation or IP rating of Realme GT Neo 2 that can indicate if the phone is dustproof or not. And also goes for if the phone is waterproof or not.
The Realme GT Neo 2 is not a dustproof phone. The phone has no labeling of a dustproof phone showing which we can tell you that the phone is completely dustproof. That’s all we can say about the phone.