Using Sharepoint Online, modern pages. I'd like to show metadata of a page, on the page itself. Some of this is default metadata, some of it is custom metadata. Is there a way to do this?
Edit your modern page and open the menu to add a webpart. There is a "Page Properties" webpart where you can configure the properties which you want to display on the page. However, at the moment I can only see the custom metadata and the title field showing up and not the CreatedBy or ModifiedBy properties
I believe for default metadata such as Author, Created, Modified you may have to build a custom SPFx webpart that fetches this information for the current page and displays it. If you want to have this on all the site pages, you'll need a provisioning process to place the webpart automatically when a page is created or place it manually when you create a page.