i tried the mod tool they gave us, and it seems it automatically uploads to the steam workshop, so i cant tell if its this reason or i dont know either myself, but best, wait little more.
the current mods you can find on steam workshop are all kinda "cool and somewhat worthless to play with em" only some small goodies, such as versus 13 noctis outfit.
im even more surprised noone made already the cindy vest fix,
Left picture of the compare is the original version SE had in mind, but changed it to this right picture lol, but overall, the mod tool alone, just works as a import tool and upload, rest you have to do with third party programs, such as blender, photoshop and whatever the modding community is using XD
but if the reason is that mod tool automatically uploads to steam-workshop after pressing "Rendering" then no wonder there are no mods on nexus up to today XD, but i guess, is this isnt the whole mod tool they gave us, they already showed some months ago on a modding tool video, a level editor will come too and much more so.... maybe the Mod Organizer is a "teaser" of whats to come xD
Edit 1.0 :
this video is what i mean