@Chack, you can set content for the FAQ page, and other defined static pages with the following variables:
static_template_{template_name}_content
static_template_{template_name}_header
These variables should be set in the site configuration: visit /admin/site_configuration/siteconfiguration/
on the lms, edit the active or desired site configuration, and set the variables formatted as a json object. For example:
{"static_template_faq_content": "<p>example faq content</p>"}
These values are cached, so it may take a few minutes before changes will display on the faq page.
I don’t know if there are official docs for this, but for reference, the code that controls this lives here.