Finder shows ONE backup ONLY. Why?
Finder, under the General tab, Manage Backups... drop down window, ALWAYS shows ONE (iPhone) backup only.
I do NOT backup my iPhone using iCloud. I backup by connecting a USB cable, via iTunes/Finder.
I can perform two manual backups using Finder, one after the other, but ONLY the latest backup is ever shown in Manage Backups...
But that is NOT what this says: Locate backups of your iPhone, iPad and iPod touch – Apple Support (UK)
iMac 21.5″, macOS 10.15