App store history purchased

Did you sue the steps mentioned in this article, to find your purchase?

See your purchase history for the App Store, iTunes Store, and more - Apple Support

Or has this been an In-App-Purchase bought directly from the developer?

I've also had this problem. Apple has been no help. I have confirmed that I am signed in to the same account on both iOS and macOS, yet my most recently purchased app appears only one one and not the other. I have signed out and re-signed-in and rebooted, but the apps simply are not syncing. It's very frustrating that there seems to be no way to report bugs like this to Apple directly.

You can report this by using one of the Feedback Links on this Apple page:

Product Feedback - Apple