Unfortunately there is no tracking or GPS within the Q2. Main thing is to wipe your device data. I don't think you need to do much else but it's probably a good idea to change Oculus and FB passwords.
First, head to www.secure.oculus.com/my/devices/ on a computer or your phone. Then, if you haven't already, log in with the Facebook/Oculus account associated with your headset. Find the Oculus Quest headset you want to wipe on the list of devices, and press “Delete Device Data".
I believe this info is still correct;
Also a good idea to contact Oculus support and tell them what's happened. They should be able to help walk though the process and advise what else you should do. Maybe try the support chat option.