On MacOS 10.15.5, “About This Mac –> Storage” is not recognizing the RAID-1 drive correctly

I upgraded from El Capitan to Catalina 10.15.5 on a MacbookPro mid-2012 , the oldest HW that Catalina will run on. Then, I created a RAID-1 drive using 2 USB disks. "About This Mac –> Storage" is not showing a logical 500-gb RAID-1 drive, the 500-gb disk RAID member, and the 500-gb partition RAID member is not displayed, but the 1-tb disk for this partition, and the other 500-gb partition on the same disk, is displayed.

On the other hand:
(1) "Go -> Utility -> Disk Utility ", (2) "Finder", and (3) command-line utilities all show the correct drive structure: the logical RAID-1 drive, the 2 physical disks, the 2 partitions of the 1-tb disk. Further, the amount of available drive space, on all disks, all agree.

note:
I did a major reorg of my data when I upgraded to Catalina. My internal disk is SSD, and Catalina automatically formatted it to APFS. Next, I emptied the 500-gb and 1-tb disks into a 2-tb disk. I decided to re-format both (hfs+). Using Catalina's RAID tool, I created the RAID-1 drive.

Everything, except "About This Mac –> Storage", looks great so I am proceeding. So, I'm just reporting this and thinking this has something to do with a mid-2012 MacBook Pro being the oldest HW to support Catalina. Since data is critical to me these days, please tell me if I should be concerned about the strange "About This Mac –> Storage" result.