Just wanted to know if Device mapper support multipath for NVME devices?
Actually I am not able to find any article where it specifies clearly about it.
I read somewhere that "device mapper is not able to work with non scsi devices like NVME", is it true? If not then can you please guide me to a article or give me steps to enable and configure Device mapper multipath for a NVME device.

You don't tell us what version/distro of Linux you're using, or where you read this, but there are MANY articles that can you can easily find about multipath and NVME with a simple Google search; have you done that?

Read the "Question Guidelines" link in my posting signature...we are happy to help you, but please don't ask people to look things up for you and 'guide you' to links, or have us type up a step-by-step guide.

Extremely sorry I did not reply to this thread earlier as at that time I thought the reply was a bit rude and did not revisit the thread again after that.

I was actually trying to connect multiple NVMEe devices that were exported which had a same memory block underneath. And for some reason at that time, it was showing me 2 different block devices on the my system whenever I connected those. I thought it was some configuration error that needed to be fixed and that's why I started this tread thinking maybe there is something that all the articles are missing.

But now that I see it, I know it was my mistake and it was really a dumb question to ask here. My sincere apologies to everyone.

And for someone who visits this thread for same query that nvme devices are not getting grouped together by dm multipath, please check the uuid of the devices. Actually for me even if I exported same nvme device but the uuids were different so the dm_multipath was not able to group them. I had to extensively assign a uuid to the devices before exporting.

Thank you @TB0ne for helping me out here.

I thought you are just pointing out that one should post system details properly while asking questions, and didn't think that you were actually asking me to provide it on this thread.
But still here are the system details,

Operating System: Red Hat Enterprise Linux 8.1 (Ootpa)
Kernel: Linux 4.18.0-147.el8.x86_64
Architecture: x86-64