Let's assume that I have application which contains 5 microservices.

1. Application 1
2. Application 2
3. Application 3
4. Application 4
5. Application 5

Every application has own plan and deployment project. In every deployment project there are environments:

1. QA
2. Staging
3. Production

I would like to manage deployment of those 5 application in one place.

Proposed solution:
Create microservices deployment project which can contain

• deployment project
• other microservices deployment project

For this Microservices deployment project you can define environment.
Let's define

1. QA
2. Staging
3. Production

Later, you link environment from deployment project/ microservice deployment project to those envs.

For this "Microservices deployment project" you can also define release, and again it is a linking of releases from child deployment projects / microservice deployment projects.

At the end you can deploy at once whole application of 5 microservices