Carbon dioxide oceans on terrestrial planets?

Graham et al. "CO₂ ocean bistability on terrestrial exoplanets"
https://arxiv.org/abs/2210.00149

Suggests that some planets orbiting F and G-type stars may cycle between climate states where carbon dioxide condenses onto the surface and warmer, non-condensing states. There may also be the possibility of planets with layered water and carbon dioxide oceans.