Looking at the lore of the Orcs presented in the 5E (Monster Manual, pgs. 244–245 & Volo's Guide to Monsters, pgs. 82–91), it seems clear to me that there isn't different subraces among orcs in D&D 5E.
No more gray or mountain orcs, just orcs and orogs, the latter no longer treated like the orcs of Underdark; now they are just regular orcs born with an intellectual gift.
Are there any official sourcebooks of 5E (adventures or rulebooks) that distinguish the orcs like the Races of Faerûn book did back in the 3.X editions or the subraces of orcs were simply discarded in 5E for now?