Hi macombweare,
The tiles display on the dashboard site where all of your pistons are displayed at but from your screenshot above, you don’t have your piston setup on a category that displays the tiles. It looks like you are going the Dashboard which displays the device statuses of all of your devices instead of displaying any tiles that are setup on your Pistons. Create a category first by going to settings on the left side, click on Categories option on top then create a category with the Tiles option selected on the dropdown besides the category you created.
Example of mine:
There’s several options for Tiles, any of the category types with Tiles will work, you can play around with the different size tiles:
Tiles and Details options will display the Piston List and the Tiles if you prefer to display it that way.
Once this is done, open your piston again and select that category that you created under Piston Category dropdown:
Example of my Door Lock Status Piston that is in the Device Status Tiles category: