Connecting to Planning Tools - Is Project to Product a 1:1 Relationship?

[snowdev8]

Hello
Often organizations use the concept of Project to spread across multiple products. 
Is the assumption of DPR that the external planning tool's Project will have a 1:1 relationship with the product?
In this case, how would Included Products external integration be set up? 
Often, planning tools create 1 project / Epic to encompass multiple Products .

[Siva Sankar Ala]

You can leverage the Multi Product Release for this use-case.
While creating a release One Product will be Primary Product and others can be mentioned as children.

But in your case if you think parent child relationship between product is incorrect.
You need to create individual releases for each product and then create a release bundle where you can view and manage all the releases.