Hello Jorge
You’re absolutely right that Frame-Relay is no longer part of any Cisco certification exams. However, the various OSPF types are (3.2.b in the official Cisco exam topics list.). The point to point OSPF network type can only be examined using a Frame-Relay topology. DMVPN does not use this network type for OSPF.
Also keep in mind this very important statement that Cisco always makes, which is found in the exam description of all of their certifications, including the link I shared above:
The following topics are general guidelines for the content likely to be included on the exam. However, other related topics may also appear on any specific delivery of the exam.
This essentially gives Cisco the right to add whatever other related topics they see fit, and for OSPF network types, this does seem to point to Frame-Relay.
Having said that, configurations of Frame-Relay itself is not expected on any exam, but configurations of OSPF on a Frame-Relay topology does seem to be fair game.
I hope this has been helpful!
Laz