Hello, see Ability to disable "Blank page" template on page creation UI - #3 by vmassol which is related.
Right now, you’d need to create a custom skin and override the page creation template to add some IF in the velocity code. See xwiki-platform/xwiki-platform-core/xwiki-platform-web/xwiki-platform-web-templates/src/main/resources/templates/createinline.vm at eef89614f07b0da00f4227c83d9516d53e4fb00e · xwiki/xwiki-platform · GitHub