Code Review mode for multiple repo project

I have an Xcode 13 project (generated with CMake) with multiple dependencies, each one pulling a different repo. I'd like to use the new Code review mode, however I can't seem to switch which repo the project is looking at. Additionally, I can use the new source control dropdown to checkout different branches however the commit hash that is displayed is from the first alphabetically ordered dependency. Is it possible to scope these features to a specific repo?