When looking at the achievements for Minecraft bedrock on the ps4 or the ps5 there are some achievements that can only be gotten on the discontinued legacy version of Minecraft for the ps4, There is no way to play this version of Minecraft anymore so the achievements that can only be gotten in this version are impossible to get, this makes it impossible to 100% the game

how to recreate: Open up the achievements on a ps5, go to expansion pack 2 and 5, you will see a list of achievements you are unable to get on the current version of Minecraft