Hidden Artifact Weapon Appearences

Hi, I have a question.

Let's say I manage to unlock the three hidden appearances for my character, but I can't unlock the ones that require:

-30 dungeons

-200 world quests

Will I still be able to get them after finishing Legion Remix? Since I did unlock the hidden appearances after all.

I've been very busy lately and I still have a couple of alts that haven't gotten those appearances yet.