This would better show the actual coverage of the C source-code. There are two ways we can approach this:

• Integrate it with cmake and use a FindGCov.cmake, Fingcodecov.cmake. There might be built-in approaches as well with ctest_coverage, but I need to study this more
• Integrate in the github action. Not sure how to call gcov manually for this though

Also, I think the codecov might not be well implemented on the pytest, it only shows the test files themselves, not the coverage of the source api.