  We consider minimal type-I seesaw framework to realize $ \mu-\tau $
reflection symmetry in the low-energy neutrino mass matrix, $ M_{\nu} $.
Considering DUNE experiment, we scrutinize its potential to measure the
precision of 2-3 mixing angle, $ \theta_{23} $ and the Dirac CP-phase, $ \delta
$ for the given symmetry. Later, we examine the precision of these two
parameters considering NuFit-3.2 data as one of the important true points. To
study the low-energy phenomenology, we further discuss various breaking
patterns of such an exact symmetry. Moreover, for each breaking scenario we
perform the capability test of DUNE for the determination of $ \theta_{23} $
and to establish the phenomenon of CP violation considering the true benchmark
point arising from the breaking of $ \mu-\tau $ reflection symmetry. We also
make remarks on the potential of DUNE to rule out maximal CP-violation or
CP-conservation hypothesis at a certain confidence level for different
scenarios.
