How to get Extension Methods to display when using assembly references

^{Originally posted by **UmaHarano** July 3, 2024}
I am having issues with extension methods to be listed in the base class.
I have two csproj files in my solution:
* Project A with a "Map" class.
* Project B in the same sln has a "MappingExtensions" class that defines extension methods for the Map class that is defined in Project A.

### Issue
* If Project B has a "project reference" to Project A:
Project A's Map class apiPage yml I generate using DocFX lists the extension methods defined in Project B.
* If Project B has a assembly reference to Project A:
Project A's Map class apiPage yml I generate using DocFX **_does not_** list the extension methods defined in Project B. This is the issue.

The problem is my code base only uses "Assembly reference". So I am missing all the extension methods. Is there a solution or work around you can recommend? I cannot use project references.