Thank you for contacting Intel® Memory and Storage support.
Our advice, since the Intel® Optane™ Memory, came pre-installed in the system and considering that you just received your PC from your OEM, and it did not come as you expected is to contact HP* support, for them to assist you and to determine if it is necessary to return the PC to their support site.
From our side, we will be able to provide you with basic information and support for the Intel® Optane™ Memory, but when it comes to BIOS and OS-specific settings, your OEM will be the best option since they may have specific settings that need to be set up.
I hope you find this information helpful.
Intel® Customer Support Technician
A Contingent Worker at Intel®