As the space.com article says "The combined data allowed the team to determine that TOI-1685 b is a "super-Earth" about 1.7 times bigger, and 3.8 times more massive, than our home planet. The resulting bulk density — about 4.2 grams per cubic centimeter, or 0.15 lbs. per cubic inch — makes TOI-1685 b "the least dense ultra-short period planet around an M dwarf known to date," Bluhm and her colleagues wrote in the discovery paper, which you can read for free on the online preprint site arXiv.org. (The paper has not yet been published in a peer-reviewed journal.) For perspective: Earth's bulk density is about 5.5 grams per cubic centimeter, or 0.20 lbs. per cubic inch. The fact that TOI-1685 b transits and is quite warm makes it a good candidate for follow-up study by other instruments, the researchers wrote. In that regard, TOI-1685 b is similar to another recent exoplanet find made using TESS and CARMENES data, Gliese 486 b."
As exoplanet studies continue, the diversity described shows our Earth is a very good place to live compared to many others confirmed now
This exoplanet has a surface temperature some 1069 K, water boils at 373 K and freezes at 273 K.
Here is another report. Ultra-short-period super-Earth detected by TESS, https://phys.org/news/2021-03-ultra-short-period-super-earth-tess.html
This report shows how warm, "These parameters make TOI-1685b the least dense ultra-short-period planet around an M dwarf known to date. The equilibrium temperature of TOI-1685b was estimated to be about 1,069 K. Therefore, it turns out to be one of the hottest transiting Earth-size exoplanets with accurate dynamical mass measurements."
TOI-1685b semi-major axis ~ 0.0123 au and host star near 0.495 solar masses.
An ultra-short-period transiting super-Earth orbiting the M3 dwarf TOI-1685, https://arxiv.org/abs/2103.01016
, "Dynamical histories of planetary systems, as well as atmospheric evolution of highly irradiated planets, can be studied by characterizing the ultra-short-period planet population, which the TESS mission is particularly well suited to discover..."
, provides some metrics for the exoplanet and host star.