Is there a tool to compare git repositories like diff?

Question

git

There are two directories, each of which is a git repository (the repositories are independent, by the way).
What is needed is a comparison tool (like KDiff3 or Meld) that can compare these directories not only by their current content, but also by their git history. Well, so that if at some point in their history some files match in these folders, so that you can view the history of each of them.
Are there such tools in nature at all?

Answer 1

You can put 2 projects in one git repository in different branches.
Well, then to merge, to rebase one into another, etc.