I just checked, and it doesn't look like anything was being uploaded to my iCloud storage. I'm unsure of where to go at this point LOL
To give some more insight, I tried uploading a family to the gallery. It said the family was uploaded, but it's not in the gallery anywhere. I've searched for it myself and had someone else search to make sure it's not just my computer whizzing out on me–neither of us can find it. The only place it shows up is in the "showcase" section when I hit the gallery button in game. I've searched the family name, my EA account ID, and everything else under the sun to find the family in the gallery. So it doesn't look like the family posted publicly which cool, but I still don't know what the deal is and why my library/gallery function isn't working.
My main issue is that I like to go in and edit the pre-made families and give them CC makeovers, and I like to carry those updated households around to each new game I create. I also like to place my other handmade households into games sometimes. I remember in the sims 3, you just had to save (maybe duplicate) the family and then you could import them into any game you wanted. Seems like I'm jumping through hoops to get that feature again unless I'm just missing a piece of the puzzle LMAO