How does one grep the Help from admin templatates in Powershell?

If I open my Local Group Policy Editor in Windows and go to Local Computer Policy -> Administrative Templates -> Control Panel -> Personalization for example, and then I click on one of the many settings listed, is there a way to grep all of the policy descriptions (listed as Help:) to find the particular policy I want to look at without reading through all of them, using PowerShell or some other tool?

In the group policy editor, click on "Administrative Templates" (either in Computer Configuration or User Configuration), then:

"Action" -> "Filter Options" -> select "Any" in "Managed", "Configured" and "Commented" to match all the group policies.

Then, you can "Enable keyword filters" and create your filter. The view will be filtered until you uncheck "Action" -> "Filter On".

(you'll need to check "Help text" unlike the screenshot above)