@ChikkaDean, Welcome to NGA
As far as I know, all plumeria produce them. Sometimes it takes many years for one to do so though. I think some are hard to pollinate, and you might not see seed-pods on those unless you are lucky or manually pollinate them. I'm no expert and only have about 30 varieties.
I have grown plumeria for 25 years and I never had one produce a seed-pod for the first 18 of those years. I was growing all mine in pots though and in zone 8 in Mississippi. Now that I'm in Florida and growing some in the ground, perhaps they'll be more prone to seed-pod growth. Oddly enough, and this shows you how important and amazing plant genetics is, only a single variety produced seed-pods last summer, and several of these plants did. That was my MM's Soft Pink. So far this summer, again, only a single variety has seed-pods, six pods on two plants, my Hausten White. One of those is potted and one is in the ground, and they are about 100' apart.
Soft Pink
Hausten White