In this paper, we conduct a research on a new version of the $( p,q ) $
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p
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q
)
-Hermite–Hadamard inequality for convex functions in the framework of postquantum calculus. Moreover, we derive several estimates for $(p,q)$
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p
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q
)
-midpoint and $(p,q)$
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p
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q
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-trapezoidal inequalities for special $( p,q ) $
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p
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q
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-differentiable functions by using the notions of left and right $(p,q ) $
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p
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q
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-derivatives. Our newly obtained inequalities are extensions of some existing inequalities in other studies. Lastly, we consider some mathematical examples for some $(p,q)$
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p
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q
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-functions to confirm the correctness of newly established results.