@siracusa I’m sure you’ve already heard this, but just in case, that list of purchases you are looking for is available on Apple.com. Shows you every purchase and has the refund button once the purchase posts.
Request a refund for apps or content that you bought from Apple
Some purchases from the App Store, iTunes Store, Apple Books, or other Apple services might be eligible for a refund. You can use any device with a web browser to request a refund.