Forget all this tracker stuff and keep people from stealing the bike in the first place. You can now buy a U lock that is angle grinder resistant to the tune of 30+ minutes on a plugin grinder (a battery powered one has less power and you need multiple batteries plus the several grinding wheels that will be worn down and need to be replaced).
Also, use layers in your locking scheme. I do a Litelok X3, which is maybe the best angle-grinder-resistant lock, plus a boron steel chain plus a second, monstrous stainless steel u lock.
You don't have to go as far as I do, but don't write off locks because you're concerned about angle grinders.
https://talesontwowheels.com/2023/12/17/litelok-x3-review-from-a-bike-owners-perspective/