Where do I look to locate recent purchases

You don't specify for which service and you posted this to the Apple ID forum which doesn't give me a clue as to which one you want. Here's a few:

Click on the link to 'See your purchase history in the App Store or iTunes Store' [iOS, computer, or web] - Does not include purchases made by others under Family Sharing; those have to be checked from their accounts. -->https://support.apple.com/HT209489

Apple Store - Viewing & Changing Orders https://support.apple.com/HT209489

Click on the link to learn how to 'See your Apple Card spending history' --> https://support.apple.com/HT209489

Ask Stubhub to send them again.

IOS

Mail - If you can't receive email on your iPhone, iPad, or iPod touch     

OS

Troubleshooting Apple Mail

What does Mail/Window/Connection Doctor Show? If the server is red, select it and look at the Show Details box.

Mail: Mail troubleshooting 

Mail: If you can’t receive messages.    

Mail not sending or receiving messages after updating OS X.     

I bought tickets using Apple Pay and selected they be sent to an Apple ID address and then on to me at my email address. They haven’t show up while Stubhub says they were sent hours ago

What is he difference between blue and green letter when I text?

If you are using Messages, a blue bubble indicates the message was sent *** a text message via cellular data. A green bubble indicates it was sent using WiFi as a normal message.