And it's also why Apple is the only one to not implement standards such as the Web Bluetooth API. If you want to work with a bluetooth device you will have to submit to the apple app store.
Web Bluetooth is not a standard and is not on track to ever become a standard, e.g. "This specification was published by the Web Bluetooth Community Group. It is not a W3C Standard nor is it on the W3C Standards Track."
It is also not supported on any version of Firefox, for the same reasons. Here's Mozilla's "considered harmful" GitHub issue. https://github.com/mozilla/standards-positions/issues/95