Show Last Updated on the node edit form

Thanks for asking about this. Can you provide more clarification on what context you're looking for. The statement below seems incomplete:

While editing a node, it would be great to see when it was last updated.

Normal node edits provide this information, as shown in the screenshot below:

In the context of Layout Builder, another common node editing paradigm, if this module's Last Updated date is set to be displayed, it will display from the Layout tab:

What context or scenario is this information not available?

It's been over a year since this issue was created. Checking with the OP or anyone else in the Drupal community following this whether more information can be provided about the feature request here. Thanks!