Would like to see a REST example for creating a SPO site with WebTemplate of PWA#0

[jebalert]

This is essentially the prerequisite classic site that would be needed before the project is made, before this module can be used. PnP Powershell can make it, but having the ability to do it via Power Automate's 'Send HTTP Request to SharePoint' would be excellent as well, particularly in Cx scenarios that require approval flows. Can't seem to find any examples for which endpoint to use, as /_api/SPSiteManager/create fails when one specifies PWA#0 for the template.