In Adopt Me, purchases made with Robux are considered "Premium Purchases".
If you've spent some Robux in-game to get some fantastic new pets or new features with gamepasses, you might be wondering where you can find a history of these purchases. You can view these on Roblox.
If you head to your Roblox Transaction History and, under the "Type of Transactions" drop-down menu, select "Purchases", you'll get an itemized list of every purchase you've made using Robux.
There is no way to filter the list to find solely Adopt Me items, so you'll have to go through to find each of your purchases amongst whatever else you may have spent Robux on.
Your purchases are logged back to your very first Robux purchase, so if you're looking for a purchase you made years ago, it will still be there.