Bike Tracker (GPS or Bluetooth): will it get your stolen bike back? | The Best Bike Lock
Best bike GPS tracker: Give yourself the best chance of a stolen bike reunion | Cyclingnews
Hidden Bike Mount for AirTag with [2 Caps], Mountain Bike GPS Tracker Anti-Theft Protection. Waterproof Bicycle Holder for All MTB Bikes with Headset Cap Size of 1-1/8" or 1-1/4" (28.6mm or 31.8mm)