I've been on a subq buying spree and items I KNOW beyond a shadow of a doubt I bought and moved to my wardrobe are showing as completely MIA from my account. An example is the Vevi Kit Hat. I literally remember buying it from Esmerelda and using the move to wardrobe feature because I thought it was super cute.

i know sometimes for me the wardrobe can take a little bit to start showing items i've just added to wardrobe (maybe 5 minutes for the cache to refresh or whatever), but if they're still not there and not showing in account search, that's definitely odd! i would file a ticket so staff can have a look.
Maybe it's a "move to wardrobe" bug, I noticed too, but if I move them manually from inventory, they show up.
I don't think the move to wardrobe is what caused it, because I remember clearly seeing the item in there while making an avatar. It even poofed a tique item I got as a lumi gift years ago. I wish I had screenshots or something but this is something I only newly noticed. Just hoping it did disappear any irreplaceable event items.

If you think an item is missing from your account, and doesn't show in your account search, you should fill out a ticket to let staff know. Staff will help you in that ticket, if something is missing!