[dismalaf]

Yes -> https://mruby.org

It's also incredibly easy to extend the main Ruby implementation with C, C++, Odin, Zig, Rust, Fortran, etc... Literally a few lines.

[vidarh]

The main Ruby implementation is also fairly easy to embed. It's just not easy to embed multiple MRI ruby instances in a single application, and it's also a lot bigger than mruby.