There are a few archive page layout choices you can choose from the theme.

1- On “Blog” page click Customize link on admin toolbar
2- Go to Bluchic Theme – Archive page settings tab
3- Check all necessary settings for your preference
4- Click Publish on top to publish your changes (Note: Make sure it’s not Draft or Schedule)

Below is the settings of demo site for your reference:
ChicServe archive page settings