How to Create a plugin based website to manage the access control and feature access for client?

I am working on a product that was very simpler in its initial phase but as the product is growing we are continuously working on new functionality and we are releasing 2-3 minor/major functionality every month.

So working with access control and feature with access with the same huge codebase is going harder every day, and it is also affecting product stability. So we are thinking about the plugging based website like our current project will be the core app new feature we will be created as a plugin and based on the client feature access we will plug/unplug on our core app.

Can someone help me a bit of design its architecture? Please share a link if anyone has a blog or other stuff.

Technology We are using:

• Django
• React
• ES & Redis for search and caching respectively

Please help me. Thanks in Advance.