one managed app router for two caps

Recently, we need a central managed app router for several caps (backend).

We only found the way for a central managed app router to several sapui5 apps (frontend).

https://blogs.sap.com/2021/04/26/achieve-separate-lifecycles-for-managed-approuter-applications-with-sap-business-application-studio/

Does someone know how we perform that for caps?