There is an excellent product for tracking a lost dog. I bought one a few years ago and highly recommend it. I’ve used it on all my RC birds and still do by mounting it on my Mavic using the dog collar mount, although today’s drones are normally easily located. Back when I bought it, it was sold by a company called Tagg. Now they are called Whistle. There is an annual fee but worth it to me for peace of mind, especially since I’ve lost $ in fly-aways back before products like the Mavic became more reliable.