  In arXiv:2305.14140 [hep-ph] the authors analyze the radiative leptonic decay
$\ell^- \to \nu_\ell \, \overline{\nu}_{\ell'} \, \ell^{\prime -} \, \gamma$ to
distinguish between Dirac and Majorana nature of neutrinos. They utilize the
back-to-back kinematics for this purpose, a special kinematic configuration
which we first proposed in our paper arXiv:2106.11785 [hep-ph]. Here we point
out how and why their analysis of the back-to-back configuration is incorrect.
This makes their conclusion and comments invalid and untenable.
