  We implement a test of MOND and Verlinde's Emergent Gravity using the galaxy
cluster SMACS J0723-7327, which has been recently imaged using the eROSITA
X-ray telescope as well as with JWST. We test MOND using two independent
methods. The first method involves comparing the dynamical MOND mass and
baryonic mass, while the second method entails a comparison of the
MOND-estimated temperature with the observed temperature. We then compare the
unseen mass predicted by Emergent Gravity with the estimated dark matter mass.
We find that MOND is able to explain the mass discrepancy at large radii but
not in the central regions. The observed temperature profile is also in slight
disagreement with that in the MOND paradigm. Likewise the Emergent Gravity
Theory shows a marginal discrepancy in accurately accounting for the dynamical
mass in the inner regions. Our results are qualitatively consistent with the
earlier tests on other clusters.
