Micro service architecture in Angular

I have 4 angular apps, let say A,B,C and D. Each apps are independent to each other and having their own node_modules.

(However in future there are possibility, I should be able to use components of app A in app B - this could be another discussion)

I want to create an app which should have navigation for A,B,C and D, lets say this app as Shell app. Shell app should be independent of other apps, it should have its own node_modules.

I am trying to achieve here micro-service architecture but I am not sure what should be my approach to achieve this in Angular. Can anyone please guide or help.