Eventually, Moon Knight and Scarlet Scarab learn the terrifying truth: the Jackal is using the hearts of the innocent children to escape justice; he is taking the hearts and using them to hoodwink the Scales of Justice.

Source: https://screenrant.com/mcu-moon-knights-scales-of-justice-dark-twist/

This version of the Scarlet Scarab was created for the MCU, having almost no bearing whatsoever on the two previous incarnations that showed up a handful of times in the '70s and '80s respectively.

Source: https://screenrant.com/marvel-female-avengers-movie-cast-characters-mcu/