While these three examples below are setting specific, they are still evidence that Evil Aligned Celestials can and do exist in D&D, generally most Celestials are of any Good Alignement, but their are some that are Neutral or Unaligned, and with those three being evil I see no reason for their not to be other Evil Celestials that can or do exist. Based from those three alone Evil Celestials fall generally into Lawful, still fulfilling the typical Lawful alignment of angels that they represent, however other Neutral or Chaotic Good Celestials exist, so a Neutral or Chaotic Evil Celestial is just as likely, otherwise a DM will have to devise their own stats for such Celestials.
Ashen Rider, Lawful Evil (Mythic Odysseys of Theros) - The fall of the ancient archon empires left some archons bitter and resentful. Seeking to avoid the spread of human civilization, these archons made their way to the Underworld. The horrors of the place broke their minds, bodies, and spirits and twisted them into the terrifying archons known as ashen riders. When they ride forth upon the mortal world, terrified mortals make offerings in a desperate attempt to appease them, but the ashen riders aren't merciful, and they delight in reducing the paragons of the mortal world to ash.
Deathpact Angel, Lawful Evil (Guildmaster's Guide to Ravnica) - Deathpact angels dwell in the grandest of Orzhov cathedrals, where they surround themselves with wealth and wretched vassals that are utterly in their thrall.
Radiant Idol, Lawful Evil (Eberron: Rising from the Last War) - A radiant idol was an angel that was banished from the celestial realm of Syrania and cast down to the Material Plane. One sin led to their fall: the desire to be worshiped by mortals. Now in the mortal realm, most radiant idols gather cults of devoted followers.