MNE-Python is maintained by a community of scientists and research labs, and accepts contributions in the form of bug reports, fixes, feature additions, and documentation improvements (even just typo corrections). The best way to start contributing is by opening an issue on our GitHub page to discuss your ideas for changes or enhancements, or to tell us about behavior that you think might be a bug in MNE-Python. For general troubleshooting of scripts that use MNE-Python, you should instead post on the MNE Forum. Users and contributors to MNE-Python are expected to follow our code of conduct.
The contributing guide has details on the preferred contribution workflow and how best to configure your system for a smooth experience contributing to MNE-Python.