In our classic business projects (where the kanban board settings cannot be edited, or even viewed) there is a component on the board cards which displays the count of completed / open subtasks (In the image below, there are 2 subtasks, and one has been completed).

I'd like this same information to be viewable in a classic software project, but none of the available fields I've added to the kanban card are giving me this component.

I can get a list of the linked subtasks with the "Sub-tasks" field (see image above), but none of the Checklist-related fields are giving me anything remotely like a % of completion, or a count of incomplete vs total sub-tasks...Either would be good.