I've been searching for snow foxes for several in game days in several different locations with absolutely no luck. I used the command "/tp @e[type=fox] ~ ~ ~" in order to test if there were any snow foxes loaded in (my render distance was set to 22 and I tried it multiple times) but only two red foxes were teleported to my location. Red foxes shouldn't have even been able to spawn because there wasn't any regular taiga biome near me only snowy taiga hills and ice plains further out. I decided to test it in a singleplayer world by creating a world using the buffet setting set to only generate snowy taiga hills and the opposite of what happened on the realms server occurred, snowy foxes spawned immediately. I returned to the realm and continued to search for snowy foxes in the entire snowy taiga hills by constantly executing the tp command as a way to check if there were any foxes loaded in and every time it was the same two red foxes that had been spawned earlier. I had even set the difficulty to peaceful to make it easier for passive mobs to spawn.No matter how many new chunks i loaded or how many in game days I waited for a snowy fox to spawn they never did, a large contrast to the results of the singleplayer world.