I recently installed OpenCore & Monterey on my Mac Pro and could not get the volume names to appear properly in the boot picker screen. This post was really helpful in getting me started - so many thanks to @JedNZ for putting together. Here is the updated version & what worked for me in...
I had been plagued with my CCC cloned NVMe drive not displaying the correct name in the OpenCore picklist, and have even written about it here in the OpenCore thread. But I have finally found a workflow that works at least for me to correct this annoyance.
Just to back up a moment first though...