Using multiple iPads
Can I backup multiple iPads (different app and data loads) to the same Mac?
iPad mini (6th generation)
Question marked as
There are no practical restrictions to the number of devices that can be backed-up to a Mac (using iTunes or Finder - as appropriate for the installed version of macOS) - or to iCloud. Each device backup is unique and independent - being internally identified by a backed-up device’s unique identifiers.
How to back up your iPhone, iPad, and iPod touch - Apple Support
