Copy/Paste from Bluetooth (Multi-Screen Copy Paste) rolled out a couple of years back on Mac. But to do it, you have to know.
So how does it work?
Bluetooth connected devices can share a common clipboard. It may be necessary to be on a shared wifi network (untested).
But the general gist is that you can copy something on your iPad, MacBook Air, etc, … and paste it to Mac.
Example of copy/pasting from iMac to MacBook Air