Accessing an iCloud backup for a device no longer owned
I need to access some files from an iPad backed to iCloud before I wiped and returned the device for credit. I recall accessing specific files from an iCloud backup years ago but am being told it is only possible by downloading the ENTIRE prior backup onto an iPad. Is it not possible to either access individual files from the backup, or if not, simply download the backup to my iMac to work with it?
Windows, Windows 6