Welcome to Alaska! No, this mod does not add a new biome, but it will add a lot of content related to Alaska to the game in one way or another. Deer, white birds as well as seals will appear in Minecraft.
Alaska Native Mod for Minecraft 1.16.5/1.16.4
In addition, you can ride an extremely fast sleigh that perfectly rides on the snow and is able to carry a chest with things. A spear will also appear and, of course, armor, which is particularly warm, because Alaska is a rather harsh region and requires warm clothing.
Your life in the snow will become easier, but at the same time you should beware of new mobs, sometimes they can be aggressive towards you. Use innovations and enjoy the gameplay in a new way.