Hello,
Welcome to Microsoft Q&A!
First, if you want to publish EXE/MSI apps, you will need to implement pricing & payment mechanism within your app by yourself. Currently, there is no official payment or pricing mechanism for EXE/MSI apps in the store.
Second, if your app has implemented pricing, payment is not processed through the Store like MSIX apps, you will need to work with a third-party payment service.
Thank you.
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.