Requires the deprecated Tour module

@SirClickalot, This module does not depends on core Tour module. So core Tour module is not required to install.

Paragraphs module dependencies:

This module support two ways to implement 'Site Tour' popup.

1) Block Configuration with Paragraphs module
2) Render Element(API)

If we are using Block Configuration, then not required to write any code. This module created one block type called "Site Tour".
We can create one custom block with this block type to show the different set of content in different places as popup.
To add the different set of content, it means collection of fields(Paragraphs) has been included as reference field in this block.

Render Element, In this way developer can generate their own array format as below based on their requirements to show the site tour popup.

      $tour = [];
      $build['sitetour']['#data']['tour'] = [];
      $build['sitetour']['#type'] = 'sitetour';

      // First tour element

      $tour['id'] = 'sitetour';
      $tour['steps'][0]['target'] = '#slide-show'; // Dom element id
      $tour['steps'][0]['title'] = 'Slide show';
      $tour['steps'][0]['content'] = 'It includes five images. Please click the next button to view the next slide image.';
      $tour['steps'][0]['placement'] = 'bottom';
      $tour['steps'][0]['arrowOffset'] = 60;

       // Second tour element

      $tour['steps'][1]['target'] = '.search'; // Dom element class
      $tour['steps'][1]['title'] = 'Search Box';
      $tour['steps'][1]['content'] = 'Please enter the text in the search box and click enter button to search.';
      $tour['steps'][1]['placement'] = 'bottom';
      $tour['steps'][1]['arrowOffset'] = 60;
      $build['sitetour']['#data']['tour'] = $tour;
   

You're absolutely right, I could have sworn it told me in the UI that it needed to enable the core Tour module but I was clearly deluded as I've tried again today and it didn't.

Might be worth adding paragraphs as a dependency into the module's composer.jsonn though so that when installing via composer it automatically attempts to install it?

@SirClickalot, Good idea! Sure, It will be available on next release.