The documentation still references PDP, but I've now created datasets in 2 different ways (API upload and Excel upload), neither has given me the tab to configure PDP on the dataset.
As long as you're the data owner or an admin (and probably not using the free version), you should still see PDP options in the data center. If all of the above checks out and it's gone for you and other admins, check in with Domo Support.
Ah, that could be it - the admin user on my partner instance is technically a "courtesy license", so that might have something to do with it. Thanks!