I wish bike manufacturers would start including GPS devices into the frames of high-end bikes. The devices would need some access to insert SIMs and charge them and then it should act as a deterrent.
Maybe it's a weight-weenie thing as e-bikes are already heavy so adding 100g isn't noticeable (not that I'd be able to notice 100g on an acoustic bike).
Having it integrated by the manufacturer means both avoiding Apple's measures and making it much harder to find and remove. So it's generally a preferable option when possible.