I’m sure you can also find instructions on how to make a DIY tracker that’s even more effective for stalking.
The airtags are by far the best tracking devices ever created and can let you locate your tag with tenth of a metre accuracy on a coin cell battery that lasts 1 year.
They get smaller and better the more you pay. Gps cell trackers are cheap and prolific
Seems to require the extended battery if you want 6 months life and that, as best I can tell, is another $60 and HUGE because it's also a waterproof box with magnet. Plus there's $20 a month cellular fees on top.