Intel Optane Persistent Memory Module as Regular Memory - possible?

Was curious to know if the Optane persistent memory modules, will downgrade and work as a regular DDR4 server memory in boards that may not support Optane technology, but may support regular ECC & RDIMMs?

No, they will not.

Optane DCPMM will not even initalize without a compatible memory controller (IMC) and a compatible UEFI BIOS to configure it.