Hi Ruchir,
Thanks for showing interest in the Code generation and parsing modules. To get started with contributing you can take a look at the issue tracker(
https://github.com/sympy/sympy/issues), and find the issues you're interested in helping with. That will help you get familiar with the SymPy codebase and the ecosystem.
As for the status, the codegen module supports code generation for the listed languages, which was also extended to support matrix expressions and Fortran code generation last GSoC. The parsing module currently supports parsing C and Fortran source code along with LaTeX and autolev and the plan is to add parsing support for some more languages like Julia, Octave etc. this year. Looks like the ideas page for the module needs to updated, I'll do it soon.
In the meantime you can get started with getting familiar with SymPy and contributing. Feel free to ask if you have any questions, here or on gitter(
https://gitter.im/sympy/sympy)
Happy contributing :)