DeviceCheck is not about detecting if the device is jailbroken, it's about detecting if the app is being emulated or tampered with.
A distinction without a difference - the purpose is to verify that the device on which the app runs hasn't been tampered with (for Play Integrity or AppCheck) from OEM state.
A distinction without a difference - the purpose is to verify that the device on which the app runs hasn't been tampered with (for Play Integrity or AppCheck) from OEM state.