Here's how to build and use template styles to create many different pages using the template Blockk for 4. With the way Blockk handles the categories presentations is very nice and works in well with the Page builder stuff.
Each template style has many parts, and these parts - the column on the left with the setup icons - have more choices for each icon using a different pull-down menu for each icon. This is the key issue: the style is saved using whatever is chosen by the pull-down choice or hand entry. There are no "sub-styles" for choosing a pull-down choice. In the individual MENU setup page area you will notice assigning a style has no further options or parameters. Whatever is chosen in the any pull-down menu setup items is what is saved to the style.
You can make radical changes in a style by changing the options in the pull-downs. Be careful when making changes!
Be sure and make clones to work on anything as it is impossible to just say back out of my last saved style choice.