“Provision of domains in secure enclave to support multiple users,” is a patent, newly granted to Apple, which is very specifically about securely allowing more than one user to use a device. That could mean Macs as much as it could iOS. Apple even refers to “both single user mobile computing devices and multi-user laptop and desktop computing devices.”
Apple is researching a development of its Secure Enclave technology to securely allow multiple users to share one iPhone or iPad without revealing private info to the other users.
Future iOS devices may allow multiple users to each have their own passcodes