I don't think it works with PCIE / NVME devices, only SATA.
Even if it did, it would be close to no improvement
Pulled from intel Website :
Intel® Optane™ memory can accelerate any type of SATA-based storage media, including SATA SSDs. However, performance benefits of adding Intel® Optane™ memory are greater on slower storage devices like an HDD, versus a faster storage device like a SATA-SSD.