Interestingly, I have the opposite problem! On my Windows computer and Android phone, I get decent quality bidirectional audio for calls, but on my (2014) Macbook it always switches to mono.
I would like to echo the concerns about academic integrity. For example, at Cornell, it is not permitted to get help from anyone but course staff on assignments in the intro CS class (and many others): https://www.cs.cornell.edu/courses/cs1110/2020sp/policies/cs...
I guess this could still be useful for help with concepts/exam prep, but not sure how much traction that would gain as people tend to be busy with the projects.