How to implement Android in-app purchases (React, Expo Webview)? - reactjs

I made a web app in React. After that, I made an android application (EXPO) in which my main application runs in Webview. I want to put my app on google play. I want to make in-app purchases, paid monthly subscriptions.
What is the best way to implement this in the web version and in Expo?
Thanks in advance!

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