Schroeder Night Commander (snc) is a Ranger extension to make it wider purpose, able to navigate any hierarchy. This functionality needs to be extended via coding. The support for it has been done. It is ready to be implemented. Developer's interested on this, please negotiate with the contributors and open pull requests.
At the moment, there are no extensions for hierarchy navigation. Stay tuned for database navigation.
The source code for this fork lives at: https://gitlab.com/brunoce/snc
The issue for Ranger maintainers to evaluate if it should be a pull request or fork is at: ranger/ranger#2791