Some that exist now:

• https://github.com/neurophysik/jitcode
• https://github.com/nest/ode-toolbox
• https://github.com/bjodah/pyodesys
• https://github.com/siravan/
• sympy2c: From symbolic expressions to fast C/C++ functions and ODE solvers in Python https://doi.org/10.1016/j.ascom.2022.100666

Also general jit libraries:

• https://github.com/yuemingl/sympy-llvm
• https://github.com/bjodah/symvarsub/