Multidimensional spectroscopy is becoming an increasingly popular tool, with ongoing efforts to access electronic transitions and many-body dynamics in correlated materials. We apply a recently proposed protocol by Wang to extract his two-dimensional polaron spectra of impure Fermi superfluids. Bass is described by his BCS ansatz, which assumes that an impurity can scatter at most one quasiparticle pair. The spectral response contains a symmetric contribution, which carries the same information as the Ramsey spectrum, and an asymmetric contribution. {\it a a priori} Investigating the quasiparticle gap from asymmetric contributions may seem promising, but if we explicitly show that this is not the case and in the absence of inconsistent processes, multidimensional spectroscopy has many applications. does not bring any additional information. Our calculations are suitable for 3D cryogenic gases, but we discuss the effects of exciton polarons in 2D materials.
