Does Graphene OS have any implementations of detecting "Unknown Trackers" or does Graphene users just have to risk the possibility of getting tracked by weirdos? (Edit: I mean Bluetooth Trackers)
It looks like the EFF recommends some app called “AirGuard”- even over using the built in scanners.
AFAIK, these apps require you to manually open it and scan, and does not constantly scan for trackers. So, unless you just have a sort of paranoid "ritual" to open the app every time, you will likely miss a tracker placed by a creepy ex who will follow you to your new address.
Both the default of of iOS and Google's Android would constantly monitor what Bluetooth signals are nearby, and give you a notification when such tracker is detected to be moving with you (regardless of which brand of bluetooth trackers).