Frozen Tears (Snow Update) Add-on 1.21+

If you want to update the snowy biomes in Minecraft Bedrock, take a look at the mod Frozen Tears (Snow Update). It adds snowstorms, auroras, new structures, and mobs. A new sub-biome appears—Aurora Forest, as well as snowy versions of creatures and caves.

Aurora Forest

Snowstorm

Aurora

Icy Lush Cave

Snowy Patches in Taiga

Cryochambers

You can get the Aurora Crystal, Snowballs, Ice Bombs, and a Snowmill—new weapons

Icy Ruins

Inhabitant Houses

Lapis Lazuli Items

Ice Items

Aurora Crystal Items

Penguin

Icy Marauder

Icy Creeper-Enderman

Icy Golem