The Awoken memento your supposed to get at the beginning of the quest is unobtainable for me and a lot of other players. I think this bug is caused by deleting a character with the Memento in its inventory. I've done almost everything you can think of just shy of deleting all my characters. I think for some reason bungie is ignoring the problem or they just don't look at the post here.
Wish Ender Quest BUGGED IN 2023 ( REALLY BUNGIE)
https://www.bungie.net/en/Forums/Post/263269538?sort=0&page=0
Awoken Memento for Hunters' Remembrance Quest Bug
https://www.bungie.net/en/Forums/Post/263827305?sort=0&page=0
Awoken Mementos glitched
https://www.bungie.net/ms/Forums/Post/263624033?sort=0&page=0
Awoken mementos gone
https://www.bungie.net/cs/Forums/Post/263585740
Wish Ender Bow Quest Bug / Broken
https://www.bungie.net/en/Forums/Post/263575064?sort=0&page=0
Awoken mementos deleted.
https://www.bungie.net/en/Forums/Post/263642653?sort=0&page=0
Deleted awoken mementos
https://www.bungie.net/en/Forums/Post/263574993?sort=0&page=0
Hunters' Remembrance quest still bugged
https://www.bungie.net/en/Forums/Post/263636603?sort=0&page=0
Wish-Ender Quest
https://www.bungie.net/en/Forums/Post/263968430?sort=0&page=0&path=1