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If there are not, just reskin some. I mean, there's no reason you can't have snow-loving orcs. Many beasts would fit. Depending on your world you could have Mammoths and Woolly Rhinoceros running around. Throw in the occasional young rhemorhaz, winter wolf, yeti or troll.
I know from personal experience while skiing that snow snakes* can be quite dangerous. So if there can be snakes hiding in the snow just about anything goes.
*aka, excuse for falling while skiing when there was absolutely no reason to fall.
Rime of the Frostmaiden boasts 50 new winter monsters. I strongly suspect many of those are just reskinned winter versions of existing monsters, like the snow owl bear.
They don't have an option for Arctic environment, but Mountain should suit your purposes just as well (you can reflavor giant eagles for example to be giant snow owls).