Rust has be reluctant to add RNG in the standard library since external libraries do the job, are pretty trivial to use and there is a high risk to bless an implementation that will be no longer cryptographically secure in a few years.
There are proposals to expose a getrandom-like API in std and make it similar to #[global_allocator]. I think it's the most we can include into std and only because randomness is already used internally by HashMap and std effectively includes its own copy of getrandom.
Looks like some of you think this proposal is about randomness in itself. Its not.
My thinking is that Python devs found a very practical and efficient way to get random hexidecimal in one line:
x = secrets.token_hex(n)
That's all it takes. And its inbuilt in Python so installing a package/crate is not necessary.
Rust is in my opinion about writing code that is secure and makes sense. If the language handles this type of mundane coding than it will benefit the community. But I don't mind if this is handled by a crate. It would work the same way.
This forum is the internals forum, about the development and evolution of the language, compiler, and standard library. If you're not asking specifically for std availability, then the correct forum is the users forum.