TennoGen items purchased after merge not showing up on PC

[Finlaena]

12/19 - I merged my PC account with my Nintendo Switch account; the Switch account's progress was made the master/primary insofar as content goes.

12/20 - via the online Steam storefront, I purchased several TennoGen skins and helmets that are not available on Nintendo Switch to use on PC with the PC version. These were bought with full knowledge that they would not show up in my Nintendo Switch's inventory.

The bought items (i.e. Zephyr Migisi, Mirage Jolli + Sigyn, Excalibur Corpra, Atlas Telamon, Chroma Tarrasque, Banshee Domina, Equinox Insomnia) have not shown up in the PC version's inventory despite several log-ins and attempts to try and equip them.

Photos are here on Twitter/X.

I do not know if this is due to the "master" progress being based off of my Nintendo Switch account or what, but I figured I'd bring this up if anyone else has had this issue as well.