It can not be tell how to create bcz it will be a very big app and you have to learn more and more or you can buy it from anyone but I can tell you some points
1 Create login with firebase authentication
Community posts about firebase authentication
Sign in with Google with Firebase Auth Component
2 Show products with any custom list view extension to you some paid custom listview
Extensions
1.deep host’s extension
[REDACTED BY MODERATION]
3.Custom ListView Extension [Paid] Any Type of Dynamic list create ( Infinite type of list )
3 make payment with any payment gateway there are several payment gateway method in community
These are the some main points I have told you but I can’t tell you how to create a full app because it will be very lengthy process and it can be take up to 3 to 4 months I hope I helped you