Apple Continuity allows a user to send contact information, presentations, and documents to other iOS users instantly and without network setup or to take a picture or video with your iPad and share it effortlessly across all associated devices.

An Apple Continuity feature called ”handoff” allows users to copy text from a document from one device and paste it into an email on a completely different device. It also allows the user to receive a phone call on their iPhone and answer it with their MacBook Pro or Apple Watch.

Continuity can result in multiple potential sources of evidence. If you can’t get into one device, is there a possibility you might be able to get the evidence you’re looking for from another? Also, it's important to realize that just because data exists on a particular device, it doesn’t mean the user was necessarily ON that device at the time the data was created.

Reference:

https://for585.com/h9tpd (Apple Continuity)