I am wondering is APPLE using RUST Software Language in their iPhones? in the past i am sure both C&C++ were used but because of memory bug problems, many programmers switched to using RUST.
It's mostly Swift, but there's probably some old software that's still using Objective-C, and historically iOS's lower-level frameworks are written in C, C++, and even Assembly.
Linux is the only major platform I can think of that incorporates Rust.
Rust doesn't solve any new problems for Apple now that they have Swift as a very mature, production-ready language.
It's a nice and very capable language, though. If you're doing any kind of low level system programming, it's a solid choice, albeit not as elegant as Swift. Right tool for the right job, I guess.