No, Odin does not compile to C. It is a standalone programming language that compiles directly to machine code. It primarily uses LLVM as its backend for compiling to machine code, like you said.
Same question but for Jai.
Jai does not compile to C. It has a bytecode representation that is used primarily for compile time execution of code, a native backend used mostly for iteration speed and debug builds, and a LLVM target for optimized release builds.