...
It’s Jira Settings → Jira Items Issues (NOT Confluence)
This is the Gibson right here:
...
Finally the answer to the original problem statement can be found in the Workflow editor (same location). When you create a new status it asks you which category you want to associate it with. If you chose “Done“ then it gives you the tickmark.
...
Selecting Done doesn’t give you the tickmark, what gives you the tickmark is adding a post-function to the transition to that status. The post function should be “Update issue field” and from there you can update the “Resolution“ field to the Done resolution. This is what gets you the tickmark.