Creating a shop to buy game passes from

Actually, I wanted to know how some developers make a shop where u can buy game passes in-game I know how to make them but some devs make it so that people can buy it even in the shop that is inside the game. Mine only shows in the game page Store area but I wanna get it inside the game shop.
Plz, help!!!

Here’s an article from the Roblox Developer Hub that provides instructions on how you could achieve this.

More specifically, the Prompting In-Game Purchases section outlines the use case you have described.