This is so frustrating. I own a ton of the packs but am trying to do a build challenge which says that the build must look like its from Jungle Adventure. I wanted some more inspiration for how the house could look from the outside than the few EA builds which are already in the world (since its meant to be a tiny home so can't actually be built in Selvadorada itself) so tried ticking only Jungle Adventure hoping to be shown builds which could give me the inspiration I was after to build my own house.
But no. It doesn't filter anything at all. If I owned all the packs it would still not be beneficial for it to work this way if I'm trying to find a build to fit in specific worlds.
If I owned zero packs and was hoping to look for builds only containing items from a set pack to see if I want to buy it, it also does nothing to help there so its not even good from a promotional point of view as you don't know from the tiny images which items are from which packs. Like yeah, you can view items in the store when going to buy a pack, but it only shows the default swatch, and some items like the wallpapers change drastically from swatch to swatch so you might not even know from the store preview of items which pack something is from.
So it doesn't even help EA attract more paying customers. Surely highlighting only builds with selected packs would be a great showcase of "look what this pack has to offer you! BUY NOW!".