Thinking more about this conversation,
I think this is a common use case:
If Lemmy is designed to only do one half, and Mastadon the other, what is the intended usage for people like me? Is there a way to use Lemmy and Mastadon together to get this?
I thought that Lemmy was planning this functionality. For example if Lemmy had an extra “sort type” option of “New posts involving people I follow”, that would be perfect.