Wolves when summoned, are no longer red, but baby wolves (wolves summon using Spawn Event "minecraft:entity_born" are still red, even in 1.16.1 with no resource packs. Also, using spawn eggs will spawn a normal wolf, even if it spawns a baby.
Note: The summary name is "Continuation of Wolves are Red. This is because an issue called "Wolves are Red" was submitted by my other account, TheMarksmanXII. Also, this event happened on a new world, on a new Microsoft account, on a new PC.