Not seeing the drive letter for additional partitions doesn't indicate anything other than it's not mounted.
What does make me think you could be right is no file system type is listed. Your C drive is listed as NTFS, while the others are not.
I believe you can right click on those and if you can assign them a drive letter. If you can, then you can look at them to see if they contain anything.
If I right click on any of the 4 partitions that I put the red box around, the only option is "Help". So there is nothing that can be done with them in the Windows "Disk Management" tool.
Note - I'm not trying to change or delete the Recovery partitions, just trying to verify if they are valid and would work if needed.
I opened the "Recovery Drive" application in Windows to see what media it found, and this is all it showed (screen shot below). It didn't see anything on the C:\ drive, which makes sense because there are already Recovery partitions that show up in Disk Management.
So the question I have is this Recovery image basically an ISO image if my C:\ drive since it says it needs 16 GB of space? I can do an ISO image to an external HD as another way to recover from a major failure. Guess the discussion should also be what's the best way to recover from an OS or SSD failure.https://support.microsoft.com/en-us/help/4028192/windows-create-an-iso-file-for-windows-10
The other thing to do is see if you can do whatever dance is needed to boot the recovery partition. I suppose vendors can store information in the recovery partition any fashion that works for them. So maybe it's not a file system that can be mounted. Just because you boot the recovery partition doesn't mean you have to perform a recovery.
I guess I could go down the path like I was going to do a "Recovery" to see if there's something there, but really don't want to mess around with it not knowing if it would launch is I went down that rabbit hole too far.
You don't mention what Dell you have, if this is the original drive, and so on. Perhaps Dell has a utility in their support site that will check and validate the recovery partition.
It's a Dell Lattitude 5598 laptop. Got it brand new a little less than 2 months ago.
If you are really worried, you can make bootable media from Windows. It is a good idea to check them out to see that you can boot from them, should you need to perform a recovery.
No matter what the final answer is, it's not a good idea to wait until you are in a crisis to see if your recovery strategy is sound.
Yes, I will probably create a Recovery image on either a USB flash drive, or create an ISO image on an external HD as described in the Microsoft link above.