"Given these possibilities, LHS 475b "very well could be an airless body that has lost any atmosphere that it once had," Lustig-Yaeger said. "But it also might possess a compact atmosphere that we are not sensitive to."
Important point to keep in mind.
https://forums.space.com/threads/astronomers-find-2nd-earth-planet-in-intriguing-alien-solar-system.59521/ has some discussion on earth size exoplanets and LHS 475 b too. The exoplanet.eu site indicates calculated temperature 586 K, water boils at 373 K. This could be a very hot almost earth-size exoplanet.