Hey there, I just tested and played a round of Trials on 1.18.2 with Optifine and it worked completely fine for myself, I'm not sure if the version you're using is the problem but I guess it wouldn't hurt to try if you wanted to get a few rounds in !
@ThatGuyAgain , You need to craft them all AFTER starting the quest or after it has become available for you. - Every Armour Piece (Helmet, Chestplate, Leggings, Boots) and Every Tool (Pickaxe, Axe, Hoe, Shovel, Sword).
Hey hey, As the others said above you need the Vip Rank, not sure if you've claimed it already but if not you can try /freevip ingame and try it out for 30 days.
If you want to change the colour/s of your name you can use any of the colour codes below. -
Hey mate, your best bet in getting it back would be to make a support ticket under the support section of the forums, which can be found here.
Best of luck. c: