Subscription Management Tool for Flutter App and JavaScript/PHP Website

I would like to integrate a premium subscription model into my Flutter app and JavaScript/PHP Website. After researching I found tools like Chargebee for the web and RevenueCat or Adapty.io for the Flutter in-app purchases.
Is there any way to streamline this into one management tool or do you know a tool that can manage both Web and Flutter App?

Any articles or ideas are welcome!