i have tried using eu version with eu dlc and us version with us dlc. i think i have the latest cia'sthe only thing I can think of is either an update isn't installed or the dlc is the wrong region.
i havent dont those but i have heard to get some item dlcs you need to first access historiaHave you done the needed in game requirements before the dlc will show up?
For the Rage of the Fallen dlc Aht must have joined the party
For the Under the Moonlight dlc Eruka must have joined the party
For the Setting the Score dlc Gafka must have joined the party
For the Bathing in Mana dlc Aht must have joined the party
For the Meeting in the Chasm dlc you must have a party of a certain level I think Level 20
ill try thathave you tried the Luma locale auto setter? It soled a similar problem I encountred with the Phoenix Whright games. Maybe it can be helpful