  It is argued that in the paper by A.A. Garcia-Diaz and G. Gutierrez-Cano
[Phys. Rev. D 100, 064068 (2019)] on nonlinear electrodynamics coupled to
general relativity, along with some interesting results and useful
observations, many statements are either inaccurate or incomplete. In
particular, the authors only consider solutions with an electric charge,
whereas their magnetic counterparts have features of equal interest, both
similar to and different from those of electric ones. Moreover, it is not
mentioned that in electric solutions with a regular center the Lagrangian
function $L(f)$ ($f = F_{\mu\nu} F^{\mu\nu}$) cannot have a Maxwell weak-field
limit. The observation on superpositions of regular solutions suffers some
inaccuracies. The present Comment tries to fill these and other gaps and to
provide necessary corrections.
