Good question stark710, You may find this report interesting, Possible solution to 'faint young Sun paradox': Primordial asteroid bombardment triggered atmospheric warming capable of sustaining liquid water -- ScienceDaily
The Faint Young Sun is an issue in geology for Earth and Mars. Here is a report on a slushy Moon and we have microorganism fossils on Earth dated 4.28 billion years ago, apparently when the Moon was still a magma ocean covering it, orbiting perhaps 10-20 earth radii distance, https://www.space.com/moon-crust-formation-slushy-magma-ocean
There is plenty taking place now in the radiometric ages used 4.5 to 4.2 billion years ago, https://forums.space.com/threads/how-was-the-moon-formed.53695/
The Faint Young Sun also involves the ZAMS Sun and its total energy output. Wikipedia has a report, perhaps 70% of current energy output, some 3.845 x 10^33 erg/s according to Allen's Astrophysical Quantities, Fourth Edition, 2000, p. 340. That would be about 2.69 x 10^33 erg/s. The ZAMS Sun could be rotating 10x faster than present Sun near 2 km/s at its equator, https://phys.org/news/2022-01-lamost-reveals-secret-stellar-rotation.html
, the ZAMS Sun could be rotating near 25 km/s, spitting out many more CME and large flares too.
Demonstrating that these solar conditions existed when microorganisms are dated some 4.28 billion years old now and apparently flourishing on Earth, as well as a Moon with a magma ocean covering it when life was flourishing on Earth, I feel is a work in progress