  New high-precision observations are now possible to constrain different
gravity theories. To examine the accelerated expansion of the Universe, we used
the newly proposed $f(Q,T)$ gravity, where $Q$ is the non-metricity, and $T$ is
the trace of the energy-momentum tensor. The investigation is carried out using
a parameterized effective equation of state with two parameters, $m$ and $n$.
We have also considered the linear form of $f(Q,T)= Q+bT$, where $b$ is
constant. By constraining the model with the recently published 1048 Pantheon
sample, we were able to find the best fitting values for the parameters $b$,
$m$, and $n$. The model appears to be in good agreement with the observations.
Finally, we analyzed the behavior of the deceleration parameter and equation of
state parameter. The results support the feasibility of $f(Q,T)$ as a promising
theory of gravity, illuminating a new direction towards explaining the
Universe's dark sector.
