Boud#InhomogeneousCosmology newsletter December 2022 [1].
Asta Heinesen's "Reconciling a decelerating Universe with cosmological observations" ArXiv:2212.05568 [2] is very nice: it introduces a new theorem that focuses a key question of relativistic cosmology: is #DarkEnergy just a misinterpretation of the structure formation epoch?
Heinesen's theorem uses the past time cone directly.
[1] https://cosmo.torun.pl/pipermail/inhom/2022-December/000021.html
[2] https://arXiv.org/abs/2212.05568 = https://ui.adsabs.harvard.edu/abs/2022arXiv221205568H