I have unlocked an even cleared Omega Weapon Ex, also unlocked Memoria Misera, neither show in high end shadowbringer trials in duty finder. I have to pass leader and get others to queue for me. It is an irritating bug.
Character Name: Omega Venom
World: Cerebus
I think that should be enough to investigate this problem but if you need more information please let me know.
EDIT: Problem is resolved now