By default, Shortcut has three workflow states for Epics: To Do, In Progress, and Done. When you create a new Epic, its state defaults to "To Do" unless you have set a custom workflow state as the default. 

The state of an Epic helps communicate the status of the overall work, and associated Stories captured in that Epic. Epics in a To Do state are represented by a grey loading icon, In Progress Epics by a blue clock icon, and Done Epics are represented with a green check icon.

You can change an Epic's state from several places in the UI. First, you can navigate to the specific Epic page and select the state from the dropdown in the sidebar:

You can also navigate to the Epics page, and click on the Table view. You can click the state dropdown and update the state directly from the Epics page.

If you use the Epics page "Column" view, any Epics that seem to be done but are still in a started state, you'll see a blue notification banner and button that will move the Epic into a done state.

You can customize your Epic workflow, just as you might your Workflow.

 Go to:

1. Settings by clicking on your user icon in the lower left-hand corner
2. Click Workflow states
3. Click on the Epics tab
4. Click “Add +” for the respective parent Workflow State