Purchased, cannot activate on all devices

Hello, I purchased Margin Note 3 in the App Store earlier today. On my iPhone and iPad I can see that I have the full version, however on my MacBook it asks me to buy again. What happened? Please help

Marginnote for IOS/iPadOS and Marginnote for Mac are two different App.

Thanks for getting back to me. That is indeed unfortunate. They look the same. They have the same name. They share the same content through iCloud. This is very misleading. It is absolutely implied that they are the same. I requested a refund through apple.