I have completed every Minecraft achievement, but all pieces of Victor’s outfit are still locked.

My guess is because every piece of Victor’s outfit (Victor’s Tunic, for example) is supposed to be gotten by completing multiple different achievements, and since there are outfits that are unlocked and earned by their own achievement, it’s probably not working because Victor’s outfit isn’t assigned to a single achievement, so Mojang please fix this, and say hi to Jeb.