Mac mini FusionDrive - “No CoreStorage Logical Volume Groups Found”
Once you're converted to APFS, CoreStorage is managed differently.
Your result for diskutil list correctly shows both internal physical drives &amp; the synthesised drive the OS constructs from that.
Note that both parts of what used to be called only from diskutil cs list both reference the same Apple_APFS Container disk2, which is correct, &amp; the construction is re-stated in the synthesized drive as Physical Stores disk0s2, disk1s2.
That it shows as Container disk2 rather than 1 means you have at some point re-formatted or reassigned, but that is of no import. Mine is up to Container disk7 on one drive these days.
diskutil cs list is now redundant.
There is a considerably more detailed explanation at The Eclectic Light Company - Fusion Drives in APFS