macOS: find last time AirPods Bluetooth headphones were connected/in the range
I was able to do brew install blueutil and then use the recent command: blueutil --recent to get the mac address of my airpods then use the info command:
blueutil --info fc-1d-43-b9-8f-05
address: fc-1d-43-b9-8f-05, not connected, not favourite, paired,
name: "James’s AirPods Pro", recent access date: 2021-05-26 18:36:22 +0000
this gives you the recent access date and time. Hope this helps!