Concretely, move a file named 'NvmExpressDxe.efi' in '\EFI\CLOVER\drivers\off' folder in the boot disk to '\EFI\CLOVER\drivers\UEFI' folder.
What's the issue, and what can I do to fix it? Specs below: OC 0.6.2 Catalina 10.15.7 SMBIOS iMac 20,1 i9-10900K Gigabyte z490 Vision D 64BG RAM Sapphire Vega 64. Frankly, I'd just try a Samsung 950 PRO, enable Legacy Option ROMs in the BIOS settings to pick up the 950, probably initialize/format the 950 MBR since it matches Legacy mode (GPT might work), and hopefully be done with it, rather than mess with Clover.
Seems the 3010's UEFI is missing something that Clover supplies to detect NVMe boot drives.