Just to add onto this as well it seems like after me checking that even if you click the “Roblox” creator who is there it still does not even filter for just Roblox.
Search API is the cause. I literally wanted to see Roblox’s assets and all I see were front-page items. I tried on mine too, and despite not having uploaded models yet I got the same results. Also happens on the Toolbox.
I already contacted Roblox thru email but it was fruitless. Has been happening since, I believe, July 15.
I’m late to the post, but I also noticed this around the same time as you! While we’re waiting for a fix, I’ve found that Roblox’s new creator marketplace (create.roblox.com/marketplace) Still works when filtering with well- basically the only filter we can add, username, however, the thumbnails seem to be very buggy.