Path-filtering regex doesn't trigger continuation

Build Environment
1

I am using a monorepo that has a folder structure as follows

+-- routes
|   +-- default-route
|   +-- frontent-route
|   +-- backend-route
|   +-- login-route

My configuration for the path-filtering is as below:

workflows:
  # The Main-Ci workflow is always triggered, regardless of the pipeline parameters.
  Main-Ci:
    jobs:
      # the path-filtering/filter job determines which pipeline
      # parameters to update.
      - path-filtering/filter:
          name: check-updated-files
          mapping: |
           # This regex does not trigger the continuation
            ^(?:\/[^\/\s]+)+route\/[^\/]*$ route-job true
            # This will continue the the build but does not identify which sub--folder of routes was changed
            routes/.* route-job true
          base-revision: << pipeline.git.branch >>

          config-path: .circleci/continue_config.yml

This regex does not trigger the continuation

        ^(?:\/[^\/\s]+)+route\/[^\/]*$ route-job true

This will continue the the build but does not identify which sub–folder of routes was changed

        routes/.* route-job true

I need to be able to determine the specific route sub-folder that has been changed and pass that as the parameter. Rather than adding 97 mappings for all of our services in our routes folder.

Any assistance would be greatly appreciated.