One of my users recently moved from SharePoint 2007 to SharePoint Online (modern ux). She asked me how to display the "Created by [name]" and "Last Modified by [name]" in the details panel of a list/library item. She sent me a screenshot showing that it's displayed by default in SharePoint 2007:
I created a new list and test item in my lab tenant and verified her report. Using calculated columns, I was able to get the Created/Modified dates to appear, but not the owner/editor metadata.
In addition to using a calculated column, I've tried using a Lookup column but that also did not make this particular information available as a selection. I tried using the List/Item Properties web parts, but they didn't allow that column to be displayed either.
I know the user can easily build views, etc to get this information. But they are accustomed to simply clicking on an item to see all the information they need. I imagine I can create a custom form in PowerApps to facilitate this but I'd like to exhaust any native SharePoint options to address this before I take that on.