Your assumption is incorrect; it does exist. GraalVM actually supports some of these. And long before GraalVM, there have been multiple commercial offerings to

Your assumption is incorrect; it does exist. GraalVM actually supports some of these. And long before GraalVM, there have been multiple commercial offerings to run FORTRAN on the JVM, but they've gone in and out of existence. Most of the time if you're writing C, Cpp, FORTRAN, your primary goal is performance, not memory safety or portability. So executing on the JVM wouldn't buy you much.