Orcs as written traditionally, are racist tropes. D&D as a game, suffers from bio-essentialism and racism. Orcs aren't even the only example. Half-races, the fact that entire peoples are treated as monoliths, the Drow being cursed with black skin, 'evil races' etc...

I'd like to recommend this thread by Amr Ammourazz if you are curious about learning more and how to potentially address bio-essentialism in your own games. https://twitter.com/ammourazz/status/1254479692968726531