  We point out that the main theorem of Ref2 := [Adv. Math. 407, Article ID
108564, 22 p. (2022)] is included in the prior research survey Ref1 := [Expo.
Math., 40(2), 265-301, 2022]. For context, we also reproduce the rather simple
proof given in Ref1 (essentially due to Janssen). We also offer a brief
discussion of the literature that is alternative to that given in Ref2.
Specifically, we differ with Ref2 with respect to novelty, relevance, and
attribution of stated results (and, to some extent, correctness of statements).
