Many previous works on carrier dephasing and thermal-ization in three dimensional lead halide perovskites have clearly identified the role of anharmonic lattice interactions in electronic processes. On a very similar note, albeit in the context of electrically neutral excitons, we find that all the phonons that dress the excitons and thus are the integral components of the exciton polaron wavefunction exhibit strong anharmonicity. Based on this observation, we emphasize the need to expand the theoretical model for excitons in these systems similar to what was proposed by Verzelen et al. to include phonon anharmonicity in the exciton many-body dynamics. We, however, note that the description presented for quantum dots is based on the Fröhlich-like coupling between the charges and the phonons. This premise works best for systems with comparable exciton binding and phonon energies, in other words, for systems with comparable exciton and phonon coherence lengths. Ruddlesden Popper halides do not satisfy this condition. However, the experimental observation of the overarching role of phonon dynamics in the excitonic characteristics is evident. It has been suggested recently that the key here might lie in considering an interplay between long-range and short-range lattice interactions, and importantly, going beyond the Frölich treatment, in which the phonon coupling is accounted separately for electrons and holes . We consider that the coherent phonon dynamics presented in this work, along with the independent observations of phonon dressing of excitons , thermal dephasing of excitons , and exciton many-body interactions , establish a solid experimental ground to build a theoretical framework to comprehend exciton polarons in semiconductor materials beyond the metal halides addressed in this manuscript.