Hi @hbgps23
Here are two options for you:
Option 1: Use the "Tagged Items" menu type and go to the "Item Selection Options" tab. Select "Include" for the "Child Tags" option. Please note that you will need to create a parent tag for the existing tags.
Option 2: Use the "List all Tags" menu type.
These options are dependent on the functionality provided by Joomla and are not specific to the template. I hope this clarifies it for you.