@olivierlambert
I think I just solved it.

I executed wget https://archive.org/download/tiny-iso-test/TinyIsoTest.iso from /Local_ISO, and that ISO showed up just fine.

I had loaded my earlier ISO's into "brand" subdirectories.
For example, /Local_ISO/Microsoft/WindowsServer2022.iso"

It appears that such sorting is not supported.
I moved both ISO's up one directory and both are now visible.
For example, /Local_ISO/WindowsServer2022.iso" works just fine.

Thanks-a-bunch for the help.