Currently you can only use Powershell as a pre-post action script. More info on that can be found here.

Hi Matt. We're trying to automate our build and peer review process and having to log into each machine to validate settings is a drag. Do you know if making those properties acccessible (at least readable) via Powershell is on the roadmap?

Not for the standalone version. Our managed product allows you to change all parameters remotely without logging in to any of your machines directly, so perhaps it would be more efficient to try that out.

We're moving to the Managed Product soon-ish, but was hoping that in the interim, we could get something that would expose properties like those in the attached screenshot.

With the Managed product, are those settings accessible via Powershell? What we are trying to do is to not have to RDP into any machine, but run Powershell Pester checks to validate settings from our desktop workspaces in VS Code or Azure Data Studio.

What you described is not really supported in any of our products. You can use our API to verify your settings in Managed backup and no RDP required once you install the software, everything can be changed by logging in to a centralized web dashboard.
Remote deploy of configurations is also available in managed backup application.
You can schedule a personal demo here if you're interested.

, please check here what we have in CLI:
https://help.cloudberrylab.com/cloudberry-backup/command-line-interface/managing-application-settings
Will this work?