Usually on 20th of each month Amazon sends emails from different amazon stores like .com, in, it, de, ca, au, nl etc....notifying that you will receive your payment on 29th of the month. And after that in reports section, payments subsection you can see these payments as scheduled and in "pending status". This month I have received emails for all stores like it, ca, au etc.. but not for amazon.com which makes the majority of sales. Did you receive an email from Amazon.com USA store that notifies you about payment on 29th? Am I the only one who didn't receive this letter?
My email just came today. But don't worry about it. If you're owed money, you'll get paid whether or not you get the email. Two months ago I got a KDP payment I hadn't been expecting because I hadn't gotten the email. The time to worry would be on August 1, if the money wasn't in your account.