Chips aren't magic. In fact, they're one of the worst things in the world, because they're extremely proprietary. As in each vet has to have a scanner capable of reading each manufacturer's chip
They can detect the presence of a chip, but if they don't have the right reader, it doesn't read. And that gets you an ID number, it has to be looked up in the manufacturer's database.
That's why when that chip manufacturer went bankrupt, they told everyone they had to get their pets re-chipped with a new one, because their chip will no longer have the database backing it up.
Also, if you move, you need to update the manufacturer with your new details - how many pets have chips but their details were not updated so it was not possible to contact the original owner.
Or even worse, because chips are proprietary, they simply couldn't read the chip at all. Each reader is for one manufacturer so vets typically only carry a couple of readers.
Chips do help, as do tattoos. But also make sure they have ID tags on their collars - dog licenses, rabies tags, and AirTags can all ID your pet provided they aren't separated from their collars. (Yeah, yeah, but it's possible to collar train your dog so they always wear them, and many of the nicer ones have built in AirTag pockets). They do make GPS trackers as well, but they're kind of large so it's only suitable for larger dogs.
There's plenty of ways to ID your pet. Use all of them - the dog license and rabies tags offer very up to date information on the owner since they're renewed annually. The AirTag can both let you leave contact information as well as help you track your pet. The chip and tattoo are there in case your pet manages to take off their collar (which they usually shouldn't if properly trained).