For anyone who does like to collect this website is fabulous and ofc All the Things is great in game too.
https://www.dataforazeroth.com/
If I go on my mounts section I can break it down to show expansions and even patches so for 10.2
Mounts
Pets
Toys
Appearances
I wouldn’t actually collect all 8k of those, I tend to just go for what my Paladin can wear or wield.