We have started this journey as well, and have some APQP documents in Windchill. As far as a single process to manage it in Windchill, no. We will be looking at some workflows to help in the future.
CAD / PLM Systems Manager
If you can share me few details, I can help you out in it.
With my team I have implemented APQP in a single process for some companies.
Adroitec Engineering Solutions Private Limited