The She Drifts, Sea Gifts daily Una’s Task has the objective as “Salvage treasure from the Treasure Salvage Point”. In the Out of the Blue co-op quest that appears sometimes during some co-op sailing events, it has you doing exactly that: salvaging treasure from treasure salvage points. And yet for some reason, She Drifts, Sea Gifts will only accept treasure salvages from the two listed on the Una’s Task, Pull It Together and Storm Treasures.
As far as I know, only the Arthetine and Yorn co-op sailing events guarantee that either Pull It Together or Storm Treasures spawn, which means that in order to effectively complete She Drifts, Sea Gifts, players must log into the game around the exact times of those two events. I understand that the Astray is supposed to be hard to get, but this change would greatly open up the ability to complete the daily Una’s Task as players would then have more opportunities per day to complete it.