How do I find out what I have purchased from Apple?

It depends upon whati ti s you htink you have purchased.

Read this support article for directions about how to see your purchase history in the App Store or iTunes Store [mobile device, computer, or web] --> View your purchase history for the App Store, iTunes Store, and other Apple media services - Apple Support

- Does not include purchases made by others under Family Sharing; those have to be checked from their accounts.

- Web: "To see charges from older purchases, you might need to look at your purchase history in Settings or the App Store."

- iOS device or computer: If you want to see purchases that you made more than 90 days prior, "tap Last 90 Days, then select a different date range."

Check an Apple Store (hardware) invoice