You wish to make custom static pages like the defaults? (eg: FAQ, TOS, Privacy Policy)
Searching the terms category:plugin custom page
led to this hopeful answer.
https://meta.discourse.org/t/static-pages-plugin/31027
I checked the forks of that github repository linked.
From there, I found that someone was kind to update the plugin to pull the latest version of the high_voltage
gem.
Be Well.