If you are using the builder, you can click on the option "Show as an admin column" when creating the custom field to display the admin column for that field. See my screenshot https://monosnap.com/file/uZqvlIiIanjm2vGg5K8GW42dEpsPjH
You have the Agency Ultimate Bundle license so you just need to install and activate one plugin Meta Box AIO to use all premium extensions. Please read more here https://docs.metabox.io/extensions/meta-box-aio/
Please share some screenshots in Meta Box > License and when you add a custom field in the field group.
Hi Peter - This was helofull to me as well...just one more refinment question though, please...how do I also add a sortable column for Revisions (MB Revison)? This is not a custom field of course, but I need this as well to see which posts were modified (revised) most recently.