In the repos directly? No, probably not. rbenv and pyenv aren't in the repos either, I'm not aware of any specific policy against it but it introduces some hesi

In the repos directly? No, probably not. rbenv and pyenv aren't in the repos either, I'm not aware of any specific policy against it but it introduces some hesitance to provide software in the repos that can be used to then install software that may conflict with software managed by the package manager itself. rubygems, setuptools/pip and cargo as examples only typically handle installation of libraries and are generally "well behaved" citizens that put files in specific locations and don't install or manage new versions of the underlying language runtime, meanwhile rbenv/pyenv/rustup can mess with your path and potentially cause conflicts that could end up with people filing bugs that are closed "not our problem, we support this one specific environment that's in the repos". Someone is welcome to try, feel free to open a thread on the fedora-devel mailing list and see what anyone else thinks. But even if rustup doesn't make it into the official repos I don't see why someone couldn't put it up on COPR.