>Shouldn't it be covered By Darkness at this point?
No.
DSCOVR orbits about a million miles from Earth in a unique location called Lagrange point 1, which basically allows it to hover between the Sun and our planet. https://solarsystem.nasa.gov/missions/DSCOVR/in-depth/
>USA should be mostly covered by darkness
The 'darkness' is the side of the earth that is pointing away from the sun. The DSCOVR satellite is positioned between the sun and the earth at the L1 point, Anon. The satellite never sees the shadowed part of the earth because the satellite is between the earth and the sun.
What is DSCOVR?
DSCOVR (Deep Space Climate Observatory) is an American space weather station that monitors changes in the solar wind, providing space weather alerts and forecasts for geomagnetic storms that could disrupt power grids, satellites, telecommunications, aviation and GPS.
DSCOVR orbits about a million miles from Earth in a unique location called Lagrange point 1, which basically allows it to hover between the Sun and our planet.
The spacecraft’s EPIC camera takes a new picture of Earth every two hours.
The EPIC camera also captures images of solar eclipses and images of the Moon as it passes between DSCOVR and Earth.
https://solarsystem.nasa.gov/missions/DSCOVR/in-depth/
"The spacecraft's EPIC camera takes a new picture of Earth every two hours."
https://solarsystem.nasa.gov/missions/DSCOVR/in-depth/
DSCOVR: Deep Space Climate Observatory
DSCOVR can typically provide 15- to 60-minute advanced warning before a storm of particles and magnetic field, known as a coronal mass ejection (or CME), reaches Earth. DSCOVR data also helps improve predictions of geomagnetic storm impact locations. https://www.nesdis.noaa.gov/current-satellite-missions/currently-flying/dscovr-deep-space-climate-observatory
Lagrange Point 1:
The Solar and Heliospheric Observatory (SOHO)
The Advanced Composition Explorer (ACE)
WIND (spacecraft) (At L1 since 2004)
The Deep Space Climate Observatory (DSCOVR), designed to image the sunlit earth in 10 wavelengths (EPIC) and monitor total reflected radiation (NISTAR)
https://encyclopedia.pub/entry/33490